Integrated tester and testing method for shock absorption, noise reduction and impact resistance of composite material

Abstract

The invention relates to the technical field of material testing, particularly to an integrated tester and testing method for shock absorption, noise reduction and impact resistance of a composite material. The tester comprises a reverberation box, an anechoic box, an upper box body and lower box body supporting and connecting table body, a high-power high-pitch horn, a front power amplifier, a pure post-power amplifier, a plurality of groups of piezoelectric ceramics, a piezoelectric ceramic driving power supply, a projectile centrifugal acceleration ejection device, and a plurality of groupsof projectile sensors, a telescopic support frame, a snake-shaped telescopic thin tube, a laser displacement sensor, a high-speed camera, a plurality of sound pressure sensors, a projectile recoverydevice and a data acquisition instrument. The integrated tester can meet the integrated test requirements for shock absorption, noise reduction and impact resistance of the composite material at the same time, has comprehensive test indexes, has the advantages of high efficiency and mobility, is convenient for on-site test, and objectively evaluates the shock absorption, noise reduction and impactresistance of the composite material.

Description

technical field [0001] The invention relates to the technical field of material testing, in particular to an integrated tester and a testing method for shock-absorbing, noise-reducing, impact-resistance performance of composite materials. Background technique [0002] With the Chinese Air Force's accelerated installation of high-performance transport aircraft, supersonic fighter jets, high-speed helicopters and other aircraft and the upgrading of power equipment, the problem of vibration and noise control in aircraft cabins has become increasingly severe. On the other hand, for surface ships and submarines whose operational scale and capabilities are constantly leaping, as the complexity of their threat targets is greatly enhanced, how to improve their vibration and noise reduction and impact resistance performance to meet the requirements of concealment, habitability, and safety. The stringent requirements of my country's naval equipment have increasingly become an urgent pr...

AI Technical Summary

Problems solved by technology

Patent CN108760205 A developed a self-excited shock-vibration composite test equipment. Although it can perform comprehensive testing of shock-vibration composite mechanical properties, it still needs to be used in conjunction with a vibration table, and portability cannot be achieved.

Although the above related patents have achieved comprehensive testing in some aspects, the integration level is still not high, and it is impossible to conduct research on vibration, noise, and shock characteristics at the same time

[0004] Separate testing of vibration reduction, noise reduction, and impact resistance results in low test efficiency, and due to the adjustment of installation boundary conditions and test sites, it is easy to cause changes in the inherent characteristic parameters of the tested sample, which seriously affects the accuracy of the test

However, most of the testing instruments currently available on the market only test a certain property of the material. If it is necessary to understand the vibration and noise reduction and impact resistance of the material, it will take a lot of manpower and material resources to build an experimental system. It will lead to the large size and high cost of the test system and test instruments used, which are not suitable for engineering site use, and lack a set of effective test methods to obtain the vibration and noise reduction of composite materials efficiently, quickly and accurately. Impact resistance

The lack of the above-mentioned testing instruments and testing methods has seriously affected the objective judgment of the scientific and technical personnel of my country's military R&D units on the vibration and noise reduction and impact resistance performance of high-performance composite materials, and has seriously restricted the development of my country's new generation of air force and navy weapons and equipment.

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