A Composite Vibration Isolation Device Based on Particle Damping and Memory Alloy Materials

Abstract

The invention relates to a composite vibration isolation device based on particle damping and a memory alloy material. The composite vibration isolation device comprises an elastic part and also comprises a particle damping part and an auxiliary limit vibration isolation part. The particle damping part contains a particle damping chamber, particles and a soft material, and the auxiliary vibration isolation part comprises a memory alloy bar, a laminated plate, rubber and a base plate. The particle damping part can be combined with the auxiliary limit vibration isolation part by virtue of technologies such as welding and bolted connection, and the auxiliary limit vibration isolation part can be connected with the elastic part, a lower base plate and the base plate by virtue of bolts or in a welding manner. By virtue of damping energy dissipation of the particle damping part and hyper-elasticity of the memory alloy bar, the composite vibration isolation device provided by the invention integrates vibration attenuation and energy dissipation into a whole and overcomes the defect that an existing vibration isolator has a poor damping effect when the frequency is lower than 20Hz, and the vibration isolation effect is better enhanced. The composite vibration isolation device provided by the invention is applicable to vibration isolation of a track in the field of track traffic and can be also applied to vibration isolation of equipment foundation or floors of sensitive buildings.

Description

technical field [0001] The invention relates to a composite vibration isolation device based on particle damping and memory alloy materials, which belongs to the field of vibration and noise control. Background technique [0002] The traditional rail transit structure will generate large vibration and noise when the vehicle is running. These vibration and noise not only affect nearby buildings and precision instruments, but also cause harm to the human body. Therefore, for densely populated buildings, ancient buildings and precision instruments that are sensitive to vibration, the vibration and noise reduction of rail transit has become an important problem that needs to be solved urgently in the field of rail transit. The research on the vibration and noise reduction track structure at home and abroad found that the floating slab track is a kind of ballast bed structure with the best vibration reduction effect recognized in the industry. [0003] The floating slab track st...

AI Technical Summary

Problems solved by technology

At present, the floating slab track is mainly divided into two types of rubber support type and steel spring support type according to the type of vibration isolation. Both types are passive vibration isolation modes. When the vibration is in a high frequency state, these two types of vibration isolation methods It has a good vibration isolation effect, but when the vibration frequency is lower than 20Hz, the vibration reduction effect of these two vibration isolation devices is not obvious. At this time, residential buildings, old buildings, and precision instruments along the line Noise-sensitive areas will be affected by low-frequency vibration of the line structure and secondary noise, and even serious problems such as heart attack of nearby residents, cracking of residential buildings, collapse of ancient buildings, and failure of precision instruments

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