JPH01202431A - Vibration damping material - Google Patents

Abstract

PURPOSE:To obtain a lightweight and high strength vibration damping material having enough vibration damping property by providing a honeycomb structure wherein a Zn-Al base alloy partition plate divides the interval made by opposedly parting Zn-Al base alloy plates into a plurality of spaces. CONSTITUTION:The vibration damping material 1 is a rectangular plate and consists of a Zn-Al base alloy partition plate arranged between Zn-Al base alloy plates 2 and 2, which are vertically and opposedly parted from each other, so as to divide the interval made between the plates 2 and 2 into a plurality of spaces. The partition plate 3 is produced by inserting a thin rectangular sheet between preheated molds so as to press it into a corrugated form in order to join it to the plates 2 and 2 by epoxy-based resin at portions 4. Thus, since the vibration damping material concerned has a honeycomb structure consisting of the partition plate 3, which divides the interval made by opposedly parting the plates 2 and 2 into a plurality of spaces and, in addition, the plates 2 and the partition plate 3 are made of Zn-Al base alloy, which is excellent in vibration absorbing property, the material concerned can be light in weight and have high strength and further have improved vibration damping property.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to materials used for walls of various structures, and particularly to vibration damping materials with vibration damping properties.

"Conventional technology" In recent years, in plate materials used for walls of various structures,
There is a need to further improve its vibration damping properties. It is known that one way to make a board material lightweight and high in strength is to form a honeycomb structure inside the board material. Such a honeycomb structure slightly improves the vibration damping properties of the plate material, but it is not sufficient.

[Problem to be solved by the invention] Therefore, recently, a plate material made of Zn-A alloy, which is a material with excellent vibration absorption properties, has been developed and is being used. In order to obtain this, the thickness of the plate had to be made relatively thick, and increasing the thickness also increased heavy debt, so it was difficult to say that it was practical.

``Object of the Invention'' The present invention was made in view of the above circumstances, and an object of the present invention is to provide a vibration damping material that is lightweight, has high strength, and has sufficient vibration damping properties.

"Means for Solving the Problem" The vibration damping material of the present invention has Z
It is characterized by having a honeycomb structure in which the n-AQ alloy plate materials are partitioned into a plurality of spaces by partition plates made of Zn-Al2 alloy.

"Example" An example of the vibration damping material of the present invention will be described below with reference to FIG.

In this figure, the symbol l indicates a damping material. This damping material 1 is in the shape of a rectangular plate, and a plurality of spaces are formed between the Zn-A & alloy metal plates 2.2 which are provided vertically and spaced apart, and these plates 2.2. It is composed of partition plates 3 made of Zn-A (I-based alloy) provided in such a manner as to partition into.

This partition plate 3 is made of a rectangular thin plate at a temperature of 150 to 160°C.
Insert between the molds preheated to 400~500 (&
9f) into a corrugated plate shape, and is bonded to the plate material 2.2 using epoxy resin at the portion indicated by reference numeral 4 in FIG.

According to the vibration damping material having the above structure, the vibration damping material has a honeycomb structure in which the space between the plates 2 and 2, which are spaced apart from each other, is divided into a plurality of spaces by the partition plate 3, and the plate materials 2 and The material of the partition plate 3 is Zn-A, which has excellent vibration absorption properties.
Since it is made of f2 alloy, it can be made lightweight and strong, and it can also improve vibration damping properties.

Further, in the above embodiment, the partition plate 3 is shaped like a corrugated plate, but it is not limited to this. For example, as shown in FIGS. 2 to 4, a plurality of flat plates extending in the longitudinal direction of the plate material 2 It may be constructed in the form of a honeycomb, or a structure in which a plurality of flat plates are arranged in a lattice.

"Experimental Example" Next, an experimental example will be given to clarify the effect of the vibration damping material of the present invention.

First, as shown in FIGS. 5 and 6, plate materials (1) and (2) made of Zn-A and alloy alloys and plate materials (2) and (2) made of Ag used for boat fishing were prepared. The external dimensions of these plate materials ① to ② are as follows.

■, ■-5X 55 x f 50 (11m) ■,
■...3 X 55 is made of Ag, and the structure is ■.

The same composite materials ■ and ■ were prepared.

The external dimensions of these composite materials (1) to (2) are as follows.

■、■・・・5 X 55 X + 50 (
ffff) ■, ■・-3,7X55x150 (m
x) Next, one end in the longitudinal direction of these plate materials ■ to ■ and composite materials ■ to ■ is fixed with a fixing jig 5 as shown in FIG. Fix with adhesive tape.

Thereafter, a load (F) was applied downward to the free end to give a constant displacement (1 mm), and then the load was removed and the plate material and composite material were vibrated.

Then, this vibration was detected by an acceleration sensor and outputted as a displacement with respect to time through an integrating circuit. The results are shown in FIGS. 10 to 13.

Table 1 also shows the moment of inertia Iz, strain energy U, load F required to displace 11 mm, and weight W of each of the plate materials (1) to (2) and composite materials (2) to (2).

Table 1 with blank space below El: Young's modulus (Zn-Af2 alloy) E: Young's modulus (Aff) S: Area of plate and composite material r: Radius of curvature when subjected to bending strain ρ+: of Zn AQ alloy Specific gravity p2: Specific gravity of AQ: Length in the longitudinal direction of plates and composites Here, to explain how to measure the vibration damping properties of the plates ■~■ and composite materials ■~■ above, the vibration damping index is , logarithmic damping rate, damping capacity, internal wear value, phase difference, and loss coefficient.In this measurement method, the amount of displacement is read from an acceleration sensor attached to the damping material. Logarithmic damping rate δ and damping capacity S, D are determined from the change in displacement amount over time.
, C are calculated using the following formula.

δ-1nl An/ An++ 1--(1) S, D,
C-(2δ)-1 (2) A indicates the amplitude of the waveform shown in FIGS. 1O to 17.

The results obtained using equations (1) and (2) are shown in Table 2.

As is clear from the results shown in Table 2 in the margin below, the moment of inertia of area is approximately equal, that is, the composite material (damping material) is of equal rigidity.
) and other materials ■, ■, ■ (■, ■, ■), it is found that the damping material ■ (■) according to this invention is superior to other materials ■, ■
, ■ (■, ■, ■) compared to the damping capacity (S.

It can be seen that D and C) are significantly larger. The board material ■ (■) related to this invention is made of other materials ■, ■, ■ (■,
It has superior vibration damping properties compared to (2) and (2).

"Effects of the Invention" As explained below, according to the vibration damping material of this invention,
This vibration damping material has a honeycomb structure in which the plates spaced apart from each other are divided into a plurality of spaces by partition plates, and the material of the plates and the partition plates is Zn-AQ, which has excellent vibration absorption properties. Since it is made of alloys, it has the advantage of being lightweight and having high strength, as well as improving vibration damping properties.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the damping material of the present invention;
Figures 2 to 4 are plan views showing modified examples of the partition plate, Figures 5 and 6 are cross-sectional views of the plates used in the experimental examples, and Figures 7 and 8 are the respective plan views of the plates used in the experimental examples. A cross-sectional view of the composite material used, Figure 9 is an explanatory diagram for explaining the experimental method, Figures 1O to 13 are Zn-Af.
Figures 14 to 17 are diagrams outputting the vibrations of the two-system alloy alloy lumber and the plate material made of A as a displacement with respect to time. It is a diagram in which vibration is output as a displacement with respect to time. 1... Damping material, 2... Board material, 3...
・Separator board.

Claims (1)

[Claims] A vibration damping material having a honeycomb structure in which a plurality of spaces are partitioned between Zn-Al alloy plate members spaced apart from each other by Zn-Al alloy partition plates.