Particle damping vibration absorption device under weightless environment

Abstract

The invention discloses a particle damping vibration absorption device under the weightless environment. The device comprises damping particles, a power vibration absorption structure and a shell containing the damping particles and the power vibration absorption structure; the power vibration absorption structure comprises two spring-mass block systems and specifically comprises two light cylindrical spiral compression springs and two cylindrical mass blocks; the shell comprises a cylindrical shell with internal threads at the two ends, two screw plugs and two guide rods used for guiding motion of the mass blocks in the power vibration absorption structure; and according to the device, the two mass blocks connected with the vibration system in a different-elasticity manner are utilized for continuously impacting the particles under the weightless environment, and continuous collision, friction and extrusion among the particles are promoted so as to dissipate energy of the vibration system.

Description

Technical field: [0001] The invention belongs to the field of passive control of structural vibration, in particular to a particle damping vibration-absorbing device in a weightless environment. Background technique: [0002] Non-obstructive particle damping technology is a relatively new passive vibration control technology. It makes some holes on the structure or attaches some hollow containers, and then fills them with damping granular materials with specific shapes, components and sizes, and uses the interaction between granular materials and the interaction between granular materials and structures to dissipate external input. Vibration energy, so as to achieve the purpose of reducing the vibration of the structure. Due to its advantages of high reliability and applicability to harsh environments, it is especially suitable for vibration reduction of aerospace structures. However, in the special environment of space (under the condition of weightlessness), the particle...

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Problems solved by technology

However, in the special environment of space (under the condition of weightlessness), the particles are out of the shackles of gravity, and the particles will be loosely and randomly suspended in the entire cavity of the container and cannot exert the damping effect.

Since the design principles of the particle damper in the ground environment are not necessarily applicable in the weightless environment, and are limited by the test conditions, there are relatively few researches on the application of particle damping in the weightless environment.

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