| Particle damping is passive vibration control technique where multiple auxiliary masses are placed in a cavity attached to a vibrating structure. The particle damper is conceptually a relatively simple device. However the behavior of the particle damper is highly nonlinear and energy dissipation, or damping, is derived from a combination of loss mechanisms. A mathematical model has been developed which will allow effective particle dampers to be designed for specific applications without extensive experimentation. The model utilizes the particle dynamics method and captures the complex physics involved in particle damping, including frictional contact interactions between individual particles and between particles and the cavity walls, and the energy dissipation due to viscoelasticity of the particle material. Application of the model is demonstrated by simulating experimental testing. Model predictions compare well with experimental test data.In this paper, studies will be made on particle damper characteristics, mainly in the following areas:(1) Analyze the impact of elastic coating particle damping technology on consuming energy and suppressing vibration.(2) According to the experiment doing on the cantilever beam system, observe and analyze the impact of elastic coating particle damping on vibration suppression.(3) Because of the guidelines for the application of particle damping technology has not been defined yet, do studies on the factors which can impact on the capacity of particle damping method through the experiments doing on the cantilever beam system. According to the results of the experiments, sum up the trend of various factors on the damping effect of the particle damping method and get the specific guidelines for the application of particle damping method.(4) Designing a perfect experimental pattern for the particle damper of cantilever beam, in order to verify the dissipating effect and influencing factors of particle damper. The experiment proves that:Elastic coating particle damping is very effective in decreasing vibration of cantilever beam. It can increase the damping ratio, decrease amplitude of each step, and dissipate the vibrating energy. However, since particle damping is a form of highly nonlinear mechanical behavior, every possible influencing factor should be consided before the dampers are designed. |
