Non-obstructive particle damping using principles of gas-solid flows
Non-obstructive particle damping is a type of nonlinear damping related to the velocity amplitude of a vibrating structure. Many scholars have spent considerable time researching the damping and energy dissipation mechanism due to interparticle collision and friction, and they achieved corresponding results by using the principles of gas-solid flows and discrete element method.
However, the damping mechanism due to kinetic dissipation between particles and gas has been entirely ignored. In this paper, a mathematical evaluation of the damping mechanisms due to kinetic dissipation is performed by using the principles of gas-solid flows.
For systematic research into the application of non-obstructive particle damping technology in engineering practice, the improved model is perfectly embedded into finite element software by using co-simulation technology, in which MATLAB invokes a COMSOL file and controls the calculation process. A frequency analysis of the experiment verifies that the prediction accuracy of the improved model is obviously increased.
Moreover, energy dissipation was explored by using the principles of gas-solid flows. Results indicate that particle damping technology can effectively control the structure vibration at a higher-order frequency. However, the energy dissipation mechanism takes effect at a lowerorder frequency.
Keywords: kinetic damping, non-obstructive particle damping, acceleration dynamic response, co-simulation technology.