基于碰撞理论的颗粒阻尼计算模型及试验研究

Computational Model Based on Collision Theory and Experimental Study on Particle Damping

以自由自由空腔梁为研究对象,填充阻尼性能好、密度小的粘弹性颗粒。从碰撞力学的角度来建立颗粒单元的动力学分析模型,并计算损耗因子,计算结果与试验结果有很好的一致性。同时采用随机激励,并通过大量的试验进一步对颗粒阻尼的减振特性进行了较深入的研究。

A free-free beam filled with viscoelastic particles is taken as the research object.It is established the model of vibration absorption from the aspect of collision theory and the computational results are in very good agreement with those of experiments.Further more,quite a lot of experiments have been conducted to research the characteristics of particle damping deeply.