Damping buffer: The influence of the structural composition of the damper on the impact damping performance
Release time:
2021-05-20 15:51
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Study the effect of damping buffer structure on the performance of impact dampers with particle damping agents. By changing the diameter of the impactor and the type of particulate material, place the damping buffer on the cantilever beam, and obtain various composition combinations through experimental methods. Response of damper under certain conditions. The results show that in the shock absorber equipped with particle damping agent, when the particle material is replaced, the average amplitude reduction rate is 72.7% -75.4%, which is higher than that of 62.7% without particles. When the impactor diameter is changed, the average amplitude reduction rate is 72.1% ~ 75.9%, which is much higher than the average value of 33.3% when only particles are in the damper. The collision damping of the particle damping agent has good damping performance, and its damping effect is better than the traditional collision damper with impactor only and the particle damper with particles only. The diameter of the impactor and the material type of the particles are. Impact damping using particulate damping agents has little effect on damping performance.
Collision damping is a passive control technology in vibration control. It uses the impact force of the impactor and the main system to control the response of the main system during the vibration process. The research of collision damping has developed rapidly recently, and has been widely used in vibration control in the fields of aerospace, aviation, military industry, automobiles, construction, bridges, railways and other structural engineering fields, and has achieved good vibration reduction effects. At present, representative collision damping includes single body collision damping, multi-body collision damping, bean bag collision damping, particle collision damping, barrier-free particle collision damping, and collision damping with particle damping agent, etc.
Collision damping mainly uses momentum exchange and friction as an energy consumption mechanism, which temporarily transfers or consumes the energy of the system. Add a collision damper with a particle damping agent composed of a steel ball impactor and a particle damping material to the damping cavity. The impact of steel ball during vibration can be used to squeeze the granular material in the cavity. Plastic deformation consumes the energy of the system. There is little research on collision damping with particulate damping agents.
Existing research has shown that replacing one impactor with multiple impactors can partially improve the damping performance of the damping buffer. The role of multiple impactors in collision damping using particulate damping agents has not been studied, and whether different particulate materials (especially non-metallic particles) are effective for dampers has not been discussed. This paper takes the collision damping of the particle damping agent as the object, and conducts an experimental study. studied the effect of particle damping agent on impact damping effect by changing the diameter, number and particle material of the impactor in the damper.
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