Abstract: The non-obstructive particle damping (NOPD) has caused people to pay wide attention as a new damping technology, because of its particular advantages, such as temperature insensitivity, radiation resistance, long working life, reliability and so on. People have done much research on the NOPD, but most of them are by experiment and simulation. It is very difficult to study the damping characteristic of particle damper (PD) though theoretical method, due to its high nonlinearity. An equivalent method is developed to model the nonlinear damping of PDs, which can exhibit characteristic of PDs’ energy dissipation adequately. For the Tuned Particle Damper (TPD), a simplified theoretical model is established. And the correctness of the model has been validated by experimental results. The research also confirms that vibration acceleration has a significant effect on the three parameters of equivalent model for PD, and this conclusion is consistent with experimental or simulation results.

Key words: dynamic vibration absorber, effect value of acceleration, equivalent damping, particle damping