Novel powder impact damping honeycomb sandwich structure

Abstract

A honeycomb sandwich composite material structure is widely used in the fields of high speed trains, aviation, space flight and the like in recent years because the structure per se has very high specific strength, specific stiffness and structural function designability. Although the structure has certain damping and vibration reducing effects, the loss factor of the structure is still low. The manufacturing technology of the honeycomb sandwich structure is combined with powder impact damping and vibration reducing technology, powder is put into a cell element of the honeycomb sandwich structure in a certain filling ratio and powder micro-particles are sealed in the honeycomb sandwich structure (specifically shown in figure 1) by using upper and lower coverings, so the vibration energy of the structure is dissipated by fully using the impact, collision and friction of the powder in a mechanical vibrating process, the resonance peak of the structure is restrained (specifically shown in figure 2) and the aim of improving the dynamic performance of the integral structure is fulfilled. Compared with a conventional honeycomb sandwich composite material structure, the novel structure has wide application range and aging and falling resistance, and is particularly suitable for the fields of aviation and space flight with severe environments.

Description

technical field [0001] The honeycomb sandwich composite structure (which can be a fiber-reinforced resin-based composite material sandwich structure or a metal-based composite sandwich structure) has been used in recent years due to its high specific strength, specific stiffness and excellent damping properties. High-speed trains, aviation, aerospace and other fields have been widely used. Because the structure has certain damping characteristics, its resonance amplitude is controlled to increase its fatigue life, which improves the dynamic performance and performance of the spacecraft, but its loss factor is still low, which cannot meet the needs of many high-tech fields. . The present invention combines the manufacturing technology of the honeycomb sandwich with the theory of vibration mechanics, applies the micro-particle impact damping technology to the damping and vibration reduction structure of the honeycomb sandwich, and utilizes the natural cell holes of the honeycom...

AI Technical Summary

Problems solved by technology

However, the performance of this damping material itself is greatly affected by factors such as ambient temperature, especially in space where the ambient temperature changes rapidly, which will make its performance extremely unstable, and it is easy to age and fall off, and soon loses the original viscoelastic damping. The function of the material, resulting in the failure of the entire instrument and equipment to operate normally

With the development of science, people have higher and higher requirements for the dynamic performance and environmental adaptability of high-tech instruments and equipment, and the traditional damping structure is far from meeting the requirements of technological development.

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