JPH05157656A - Vibration test device and method and vibration response analysis method of structure - Google Patents

Abstract

(57) [Summary] [Purpose] In the vibration test equipment that combines the actual vibration test and numerical calculation, it is accurate even when the reaction force that changes faster than the time step of numerical calculation occurs in the structure to be excited. Provided is a structure vibration test apparatus capable of performing various vibration response evaluations. [Configuration] An actuator 2 is attached to a structure to be excited 1, and the actuator 2 is controlled by a control device 3. The digital computer 4 inputs the impulse measurement value measured by the impulse measurement means 7 using the signal of the load converter 6 via the communication means 8, and uses this impulse measurement value to measure the time after a predetermined time. Calculate the vibration response value at the boundary point. This vibration response value is input as a vibration signal to the control device 3 of the actuator 2 via the vibration signal communication means 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure vibration test, and a structure vibration test apparatus and a vibration test method suitable for a large-scale structure in which a load generated inside greatly fluctuates in a short time. Regarding Further, the present invention relates to a vibration response analysis method for a structure including a member in which a load generated inside fluctuates greatly in a short time.

[0002]

2. Description of the Related Art In a conventional vibration testing apparatus for a structure, the vibration response of the structure when it is vibrated by an earthquake or the like can be evaluated by mounting the whole structure on a vibration table and vibrating it. It was done. However, when the structure is very large, it may be difficult to mount the entire real object on the vibrating table due to the limitation of the allowable load of the vibrating table. In such a case, the vibration response may be performed by the structure to be excited, which is a scale model that can be installed, or only part of the structure may be subjected to the vibration test, or both may be applied to obtain the vibration response. Was being evaluated. However, the former has a problem that it is difficult to completely satisfy the similarity rule when modeling the scale, and the latter has the problem that the excitation vibration itself is coupled with the response of the structure to be tested. There was a problem that it was difficult to evaluate variously. Therefore, only a part of the structure is excited, the other part is modeled numerically, the vibration response at the boundary is calculated by a digital computer, and the actual model is vibrated by this, and further numerical modeling is performed using the reaction force. A vibration test method for evaluating the response of the structure has been considered.

A vibration test method in which a part of a structure is vibrated by using a real or model, and the other part is numerically modeled and a response is calculated by a digital computer is disclosed in JP-A-61-61
There are JP-A-34438 and JP-A-61-232835. Further, a vibration test apparatus and a vibration test method for performing a test in real time or measuring a reaction force at regular time intervals have been proposed for structures applicable to installation equipment or structures in general.

[0004]

In the conventional vibration test apparatus and vibration test method, the time axis is actually measured as described in JP-A-61-34438 and JP-A-61-132835. The displacement is given by the actuator in a larger scale. Therefore, the reaction force that depends only on the displacement can be accurately evaluated, but the reaction force that depends on the velocity such as the viscous damping force cannot be evaluated. Also, in the latter, since an actuator that applies a load to simulate the inertial force is provided, the reaction force that depends on the acceleration is evaluated, but since the load from this actuator is applied to one point, the model is added to the concentrated mass system. There was a problem that it became inaccurate for structures that could not be converted. In order to solve such a point, a method of exciting the boundary point between the structure to be excited and the numerically modeled structure in real time was proposed, but this method measures the reaction force at regular time intervals. Therefore, there is a problem that the vibration response evaluation becomes inaccurate when a reaction force that changes faster than this time step, such as a slip or a collision, occurs in the installed device. In order to accurately evaluate the vibration response using these conventional techniques when there is a reaction force that changes rapidly with time, the time step of calculation of the vibration response may be made sufficiently small with respect to the time change of the reaction force. However, there is a limit to this, and the time step cannot be made smaller than the calculation time required to evaluate the vibration response of the numerical modeling structure.

The object of the present invention is to provide a large structure and
It is an object of the present invention to provide a vibration test apparatus, a vibration test method, and a vibration response analysis method for a structure, which enables accurate vibration response evaluation even for a reaction force having a very rapid time change inside the structure.

[0006]

In order to achieve the above object, a structure vibration test apparatus according to the present invention comprises a structure to be vibrated in which a part of the structure is modeled by using a real object or a model, Excitation with the numerically modeled structure that numerically models the other part of the structure At least one actuator that excites the boundary point of the target structure, a controller that controls each actuator, and a numerically modeled structure In a structure vibration test device consisting of a digital computer that calculates the vibration response at the boundary point and outputs the excitation signal calculated from the calculated vibration response to the control device, the force of the reaction force generated in each actuator The digital computer is provided with a product measuring means and a communication means for inputting the impulse measurement value to a digital computer. It was calculated, a structure that includes means for outputting a vibration signal to realize the vibration response by the respective actuator after a predetermined time.

Then, a boundary point of the structure to be excited between the structure to be excited by modeling a part of the structure using a real object or a model and the numerically modeled structure in which the other part of the structure is numerically modeled. At least one actuator that vibrates, a controller that controls each actuator, and a vibration signal that calculates the vibration response of the boundary point of the numerical modeling structure and that is calculated from the calculated vibration response to the controller. In a vibration testing device for a structure, which comprises a digital computer that outputs the following, a second digital computer having a load converter that measures the reaction force generated in each actuator and an analog-digital converter time-controlled by the digital computer. And a communication means for inputting the impulse measurement value to the digital computer. The second digital computer is provided with means for calculating the vibration response of the boundary point ahead of a fixed time using the impulse for each time, and outputting the vibration signal for realizing the vibration response by each actuator after the fixed time. Is
It may be configured to include means for accumulating the load values input via the analog-digital converter in a time step smaller than the time step of the vibration response calculation.

Further, the digital computer is provided with an analog-digital converter, the second digital computer is provided with a digital-analog converter, and the input of the impulse measurement value to the digital computer is performed by the second digital computer. The voltage signal output by the digital-analog converter may be input to the analog-digital converter of the digital computer.

Further, the communication means for inputting the impulse measurement value to the digital computer is such that the second digital computer writes the impulse measurement value in a memory which can be simultaneously accessed by the two digital computers, and the impulse measurement value is digitally recorded. It may be configured to be read by a computer.

Each of the digital computer and the second digital computer may be capable of parallel processing, and the processing of each digital computer may be performed by one computer.

In the vibration test method for a structure, a part of the structure is modeled as a structure to be excited by using a real object or a model, and the other part of the structure is numerically modeled as a numerically modeled structure, and then added. Numerical modeling of the structure to be shaken Numerical modeling of the boundary point of the structure with at least one actuator, digital modeling with one actuator The vibration response of the boundary point of the numerical modeling structure of the digital computer calculated with one actuator In the vibration test method for structures that are vibrated based on this, the impulse of the reaction force generated in each actuator is measured, and the impulse measurement value is input to the digital computer. Is used to calculate the vibration response of a boundary point ahead of a certain time, and the vibration response that makes each actuator realize that vibration response after a certain time The calculated output constituting the.

Further, in the vibration response analysis method for a structure, a part of the structure is modeled as a structure to be excited by using a real object or a model, and the other part of the structure is numerically modeled as a numerical modeling structure, The vibration response of the numerically modeled structure is calculated by a digital computer, and based on the vibration response, the boundary point between the numerically modeled structure and the target structure to be excited is excited by at least one actuator to determine the vibrational response of the boundary point. Analyzing, in the vibration response analysis method of the structure for analyzing the vibration response of the numerical modeling structure after a certain time using the result, the reaction force generated in each actuator is integrated as the impulse measurement value, The impulse measurement value is input to the digital computer, and the digital computer is configured to analyze the vibration response of the numerically modeled structure at a fixed time ahead using the impulse at fixed time intervals. .

[0013]

According to the present invention, the impulse of the reaction force is obtained by integrating the reaction force generated during each fixed time interval of the vibration response calculation, and therefore, the numerical modeling using the impulse of the reaction force is performed. The vibrational response of the structure will include all the effects of reaction forces within that time. Therefore, even if the time step of the vibration response calculation is larger than the time change of the reaction force, the vibration response can be evaluated with sufficient accuracy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the excitation target structure 1 modeled by using a real or model of a part of the structure, and the numerical values of the excitation target structure 1 and other parts of the structure. At least one actuator 2 mounted at a boundary point 10 with the modeling structure 9, a controller 3 for controlling each actuator 2, a vibration response of the boundary point 10 is calculated and the controller 3 Digital computer 4 that outputs an excitation signal calculated from the calculated value of vibration response
The vibration testing apparatus for a structure consisting of the
The actuator 2 is attached to the. The actuator 2 is controlled by the control device 3. The digital computer 4 inputs the impulse measurement value measured by the impulse measurement means 7 using the signal of the load converter 6 via the communication means 8, and uses this impulse measurement value to measure the time after a predetermined time. Calculate the vibration response value at the boundary point. The vibration response value is used as a vibration signal, and the actuator 2 is transmitted via the vibration signal communication means 5.
Input to the control device 3 of. The structure is as shown in Figure 2.
It is divided into an excitation target structure 1 and a numerical modeling structure 9 which are actual machines or models which are modeled so that vibration characteristics are equivalent to those of the actual machines. Then, the vibration response of the boundary point 10 is realized by the actuator 2, and the vibration target structure 1
Vibrate.

A method of vibration response analysis by impulse that can be applied to the present invention will be described. The equation of motion of the numerical modeled structure shown in FIG. 2 is as follows.

[0017]

[Equation 1]

[M]; mass matrix of numerical modeled structure, [C]; damping matrix of numerical modeled structure, [K]; stiffness matrix of numerical modeled structure, {X}; numerical modeled structure Is the displacement vector of {f}; the external force vector applied to the numerically modeled structure, {q}; the reaction force vector added to the numerically modeled structure from the structure to be excited, and 'denotes the time derivative. {F} is a known external force vector due to an earthquake or the like occurring in the foundation of the structure.

Assume that the vibration response of the structure is calculated at fixed time intervals Δt, and the displacement vectors at the i−1th step, the ith step and the i + 1th step are {X} i−1 and {X} i, respectively. ,
Let {X} i + 1. By interpolating the displacement response from the i-1 step to the i + 1 step with a quadratic function of time, the time at the i step can be represented as t = 0, and can be expressed by the following equation.

[0020]

[Equation 2]

Therefore, the velocity / acceleration can be expressed by the following equation.

[0022]

[Equation 3]

[0023]

[Equation 4]

[Mathematical formula-see original document] When formula 1 is integrated in the interval-[Delta] t / 2 to [Delta] t / 2, the following expression is obtained.

[0025]

[Equation 5]

Using equations 2 to 4,

[0027]

[Equation 6]

[0028]

[Equation 7]

[0029]

[Equation 8]

Therefore, by substituting this into Equation 5 and rearranging it,

[0031]

[Equation 9]

It becomes

With this algorithm, the displacement vector {X} of the structure can be determined by using the impulse vector {Q} of the reaction force vector {q} of the boundary point, and thus the displacement of the boundary point is obtained. .. Based on the above algorithm, the digital computer 4 uses the impulse of the reaction force applied from the vibration target structure 1 to the boundary point 10 of the numerical modeling structure 9 to determine the vibration response (displacement and displacement of the numerical modeling structure 9). / Or acceleration)
It has a function to calculate FIG. 3 shows a conceptual diagram of a time table for executing the present algorithm and giving a vibration signal to the actuator control device. In this algorithm,
To obtain the displacement vector {X} i + 1 at time t + Δt, t−
An impulse between Δt / 2 and t + Δt / 2 is required. Therefore, if the time required for vibration response calculation is T, time t + Δ
Only after t / 2 + T, the displacement vector {X} i + 1 can be obtained.
Therefore, as shown in FIG. 3, the vibration signal is output by interpolating with a straight line (outputting means).

According to this embodiment, even if the structure cannot be mounted on the vibration table, the vibration response of the whole structure can be evaluated by conducting a partial vibration test. Further, even if the reaction force from the structure to be vibrated includes a component having a very rapid temporal change, accurate vibration response evaluation can be performed.

In this embodiment, there is only one part where the vibration test is performed in the real model, but the same test device can be constructed even if there are two or more parts. Further, although the actuator 2 and the load converter 6 in FIG. 1 are configured in only one direction, an actuator and a load converter having a maximum of 6 degrees of freedom can be used depending on the target structure. For example, as shown in FIG. 4, the actuator with 6 degrees of freedom and the load converter include six uniaxial actuators 21, a rotatable bearing 22, a load converter (not shown) provided in each actuator, and Output from load converter F ₁
Coordinate Fx~Mθ being used to ~F ₆ in the calculation of the numerical model
It can be constituted by a device 23 for converting into x, and displacements X to θx at the coordinates used for calculation of the numerical model into displacements d _{1 to} d ₆ of the actuator. Further, the number of actuators attached to one excitation target structure is not limited to two as shown in FIG. 1, and one or three or more actuators may be provided depending on the model of the test target. It doesn't matter. Furthermore, the vibration response of the boundary point is not limited to displacement, and may be velocity, acceleration, etc., and the vibration response calculation means may use not only the above algorithm but also another appropriate calculation algorithm. That is, various configurations can be made without departing from the gist of the present invention.

Various methods are conceivable as the communication means for sending the excitation signal to the control device of the actuator. If the control device is a digital control device, a digital signal can be directly sent from the digital computer 4 to the control device 3 through the data bus 11 as shown in FIG. According to this method, there is no fear of deterioration in accuracy due to conversion of the data format.

When the control device has an analog signal input section, as shown in FIG. 6, a digital computer 4 is provided with a digital-analog converter 12 to convert the excitation signal into a voltage signal. Input to the control device 3. With this method, it is not necessary to provide a dedicated data bus, etc.
Versatile because the existing actuator can be easily incorporated into the device.

Next, one embodiment of the impulse measuring means will be described with reference to FIG. The impulse measuring means is the load converter 6
And a second digital computer 15 provided with an analog-digital converter 14 for converting the voltage signal 13 from the load converter 6 into a digital value, and the vibration response calculation of the first digital computer (digital computer). The clock pulse 16 is supplied from the first digital computer 4 in order to synchronize with. The second digital computer 15 takes in the load value at a time step δt smaller than the time step Δt of the vibration response, and integrates the load value to calculate the impulse for the required period. According to this configuration, since the second digital computer 15 does not take charge of complicated vibration response, the load value can be captured even in a considerably small time step, so that an accurate impulse can be obtained even if the reaction force changes rapidly with time. Can be measured.

In the impulse measuring method, the output from the load converter may be obtained by using the integrating circuit of the analog computer and the difference between the output values at the first and last times of the impulse evaluation period may be taken.

Various methods are conceivable for the means for inputting the measured value measured by the impulse measuring means to the digital computer.
FIG. 8 shows an example thereof. Second digital computer 15
Is converted into a voltage signal 17 by a digital-analog converter, and this voltage signal 17 is input by an analog-digital converter provided in the first digital computer 4.

Another embodiment is shown in FIG. In addition to the first and second digital calculators, a memory 18 accessible by two digital calculators is provided, and an impulse measurement value obtained by integrating by the second digital calculator is written and read by the first digital calculator. The input is done.

Further, as shown in FIG. 10, the first digital computer may be a computer 40 capable of parallel processing, and two CPUs in the same computer may perform the processing of the two computers in parallel. is there. That is, the CPU 41 that performs the process that the first digital computer was in charge of
And the CPU 151, which executes the process in charge of the second digital computer, performs parallel processing and transfers the impulse measurement value using the data bus in the computer. Further, as shown in FIG. 11, a memory 18 accessible by two digital computers may be provided in the computer 40.

With the above-described embodiments and other configurations of the present invention, the vibration response calculation required for the present invention and the actuator control can be performed at high speed, and the vibration test of the structure can be performed with high accuracy. be able to.

Further, not only the boundary points but also other parts of the numerical model are calculated by the digital computer at the same time and stored in the internal memory or the external memory of the digital computer to calculate the vibration response of the entire structure. It can be carried out. It is also possible to store the measured impulse of the reaction force in a memory, and after completing a series of vibration experiments, use the impulse record to evaluate the vibration response of the necessary part. ..

Further, another embodiment of the present invention will be described with reference to FIG. This is an example applied to the seismic evaluation of the fast breeder reactor core structure. Fig. 12 shows the fast breeder reactor.
As shown in, a tank called a main container 50 is fixed to the roof slab 52, and the roof slab 52 is supported by the foundation 53. The core structure 51 is installed in the main container 50. Shaking table tests are required to evaluate the seismic resistance of the core structure 51, but seismic waves are transmitted from the foundation 53 to the roof slab 52 and the main container 50 as input to the support part of the core structure 51. It is a thing. In addition, the seismic waveform of the foundation 53 may have passed through the route of the building. Since the vibration coupling between the core structure and other structures occurs in the process of the transmission, it is impossible to uniquely determine the acceleration of the core structure supporting portion from the seismic input without the response of the core structure 51.

Further, in the core structure 51, as shown in the sectional view of FIG. 13, a large number of hexagonal cross-section core constituent elements 54 are housed in a core tank 55. Core component 54
Is inserted into the core support plate 58 and has a cantilever structure. Further, it has a protrusion called a pad 57, and transmits a collision force here when vibration occurs due to an earthquake or the like. The core vat 55 is provided with a support called a restraint frame 56 so that the displacement of the core component 54 does not become excessive. The core structure and other structures are the core support plate 58.
Are coupled with the reaction force generated at the collision frame and the collision force generated at the restraint frame 56. FIG. 15 shows the core component 5 by the external force (acceleration).
4 shows an example of the collision force generated in FIG. The collision part numbers 1 and 12 in the figure are pulse forces due to the collision force generated in the restraint frame 58 part. Therefore, the collision force cannot be measured with sufficient accuracy in the time step normally used for calculating the vibration response, for example, 10 ms. Therefore, the vibration test apparatus may be configured as shown in FIG. In this example,
A vibrating table 59 driven by the actuators 2a to 2c is used as the actuator. The collision force generated in the core structure 51 is also evaluated by measuring the impulse. Therefore, the vibration response of the surrounding structure due to the vibration of the core structure 51 can be accurately evaluated, and the vibration can be realized by the vibrating table 59, so that the vibration response of the core structure and the entire structure including the core structure can be evaluated and calculated sufficiently. It can be performed with high precision.

Further, another embodiment will be described with reference to FIG. This is an example applied to the vibration evaluation of a building structure supported by seismic isolation. FIG. 17 shows an explanatory view of the building structure 60 that is seismically isolated. The building structure 60 is supported by a foundation 62 via seismic isolation elements 61. Seismic isolation element 61
Is, for example, as shown in FIG.
3 and a friction damper 64. Further, the friction damper 64 reduces the displacement of the building structure 60 by the frictional force generated between the two friction materials 65, 65. Since static friction force is generated here, relative deformation does not occur between the building structure 60 and the foundation 62 until the inertial force acting on the building structure 60 due to an earthquake exceeds the static friction force of the friction damper 64. However, once the displacement occurs, the frictional force changes to the dynamic frictional force, so that the effects of the frictional force and the friction damper are slightly reduced. Therefore, the movement of the building structure 60 and the change of the reaction force become very fast. Therefore, the test apparatus is configured as shown in FIG. That is, using the actuator 2a simulating the horizontal vibration and the actuator 2b simulating the vertical vibration related to the frictional force, the reaction force measurement values of both are input to the digital computer through the impulse measuring device 7. According to the present embodiment, since a rapid change in reaction force can be evaluated in analysis, it is possible to perform an accurate vibration test of the seismic isolation element 61 and a vibration response analysis of the entire structure.

[0048]

According to the present invention, it is possible to evaluate the vibration response by vibrating a real part or model of a structure.
Accurate vibration response evaluation is possible even for large-scale structures. Further, even if there is a portion in the structure that generates a reaction force that changes rapidly with time, it is possible to accurately evaluate the vibration response with a time step that can be realized that is larger than the time change.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vibration test apparatus showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating modeling of a structure.

FIG. 3 is a diagram showing a timetable for executing a calculation algorithm according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a 6-degree-of-freedom actuator and a load converter showing another embodiment of the present invention.

FIG. 5 is a diagram showing an embodiment of a communication means of an excitation signal of the present invention.

FIG. 6 is a diagram showing another embodiment of the vibration signal communication means of the present invention.

FIG. 7 is a diagram showing an embodiment of impulse measuring means of the present invention.

FIG. 8 is a diagram showing an embodiment of a means for communicating impulse measurements according to the present invention.

FIG. 9 is a diagram showing another embodiment of the means for communicating impulse measurements according to the present invention.

FIG. 10 is a diagram showing an embodiment of a digital computer of the present invention.

FIG. 11 is a diagram showing another embodiment of the digital computer of the present invention.

FIG. 12 is a side view of the fast breeder reactor.

FIG. 13 is a sectional view of a fast breeder reactor.

FIG. 14 is a diagram showing fast breeder reactor core components.

FIG. 15 is a diagram showing an example of a collision force generated in a core component.

FIG. 16 is a diagram showing an example of a vibration testing apparatus for a fast breeder reactor core.

FIG. 17 is a diagram illustrating a building structure that is seismically isolated.

FIG. 18 is a diagram illustrating the structure of a seismic isolation element.

FIG. 19 is a diagram showing an example of a vibration test device for seismic isolation elements.

[Explanation of symbols]

1 vibration target structure, 2 actuator, 3 control device, 4 digital computer, 5 vibration signal communication means, 6 load converter, 7 impulse measurement means, 8 impulse measurement value communication means, 9 numerical modeling Structure, 10 boundary points, 11 data bus, 12 digital-analog converter, 13 voltage signal, 14 analog-digital converter, 15 second digital calculator, 16 synchronization signal, 18 memory, 21 single-axis actuator,
22 rotatable bearing, 40 digital computer capable of parallel processing, 41 first digital computer's process, 50 main vessel, 51 core structure, 52 roof slab, 53 foundation, 54 core components, 55
Reactor core, 56 Restraint frame, 57 pad, 58 Core support plate, 59 Shaking table, 60 Building structure, 61
Seismic isolation element, 62 foundation, 63 laminated rubber, 64
Friction damper, 65, 66 friction material,

Claims (7)

[Claims] 1. A structure to be excited, which is a structure to be excited by modeling a part of the structure using a real object or a model, and a numerically modeled structure in which another part of the structure is numerically modeled. Of at least one actuator that excites the boundary point of the controller, a controller that controls each actuator, a vibration response of the boundary point of the numerical modeling structure, and the controller calculates the vibration response from the calculated value of the vibration response. In a structure vibration test apparatus including a digital computer that outputs a calculated vibration signal, impulse measuring means for reaction force generated in each actuator, and communication for inputting the impulse measurement value to the digital computer. Means for calculating the vibration response of the boundary point at a fixed time ahead using impulses at fixed time intervals, and after each fixed time, the actuating response of the boundary point is calculated. A vibration testing apparatus for a structure, comprising means for outputting the vibration signal for realizing the vibration response by an eater. 2. A structure to be excited, which is a structure to be excited by modeling a part of the structure using a real or model, and a numerically modeled structure in which the other part of the structure is numerically modeled. Of at least one actuator that excites the boundary point of the controller, a controller that controls each actuator, a vibration response of the boundary point of the numerical modeling structure, and the controller calculates the vibration response from the calculated value of the vibration response. In a structure vibration test apparatus including a digital computer that outputs a calculated excitation signal, a load converter that measures a reaction force generated in each actuator and an analog-digital converter that is time-controlled by the digital computer. And a communication means for inputting an impulse measurement value to the digital computer, The digital computer comprises means for calculating the vibration response of the boundary point ahead of a fixed time by using the impulse for each fixed time, and outputting the vibration signal for realizing the vibration response by each actuator after the fixed time. However, the second digital computer is provided with means for accumulating the load value input through the analog-digital converter in a time step smaller than the time step of the vibration response calculation. Vibration tester for structures. 3. The vibration test apparatus for a structure according to claim 2, wherein the digital computer comprises an analog-digital converter, and the second digital computer comprises a digital-analog converter. The input of the impulse measurement value inputs the voltage signal output by the digital-analog converter of the second digital computer to the analog-digital converter of the digital computer. .. 4. The vibration testing device for a structure according to claim 2, wherein the communication means for inputting the impulse measurement value to the digital computer is such that the second digital computer outputs a force to a memory which can be simultaneously accessed by the two digital computers. Write product measurements,
A vibration testing apparatus for a structure, wherein the measured value of impulse is read by the digital computer. 5. The vibration testing apparatus for a structure according to claim 2, wherein each of the digital computer and the second digital computer is capable of parallel processing, and the processing of each digital computer is performed by one computer. Vibration tester for structures. 6. A part of a structure is modeled as a structure to be excited by using a real object or a model, and another part of the structure is numerically modeled as a numerically modeled structure, At least one actuator at the boundary point with the numerical modeling structure, in the vibration test method of the structure that is excited based on the vibration response of the boundary point of the numerical modeling structure calculated by a digital computer, in each actuator, The impulse of the generated reaction force is measured, and the impulse measurement value is input to the digital computer, and the digital computer calculates the vibration response of the boundary point after a predetermined time by using the impulse at a constant time. Then, the vibration test method for the structure is characterized by calculating and outputting a vibration signal that causes each actuator to realize its vibration response after a predetermined time. 7. A vibration response of the numerical modeling structure, wherein a part of the structure is modeled as a structure to be excited by using a real object or a model, and the other part of the structure is numerically modeled as a numerical modeling structure. Is calculated by a digital computer, the boundary point of the structure to be excited with the numerically modeled structure is excited by at least one actuator based on the vibration response, and the vibration response of the boundary point is calculated, and the result is calculated. In the vibration response analysis method of the structure for analyzing the vibration response of the numerically modeled structure after a certain time using, the reaction force generated in each actuator is integrated into an impulse measurement value, and the impulse measurement value Is input to the digital computer, and the digital computer analyzes the vibration response of the numerically modeled structure at a predetermined time ahead by using impulses at constant time intervals. Vibration response analysis method.