关键词: 振动与波, 摩擦阻尼, 减振, 损耗因子, 能量法

Abstract:

To study friction damping characteristics, a proposed dynamics equation of two-degree-of-freedom friction system is analyzed. By employing the principle of conservation of energy and the damping principle, the loss factor of the friction damping system is defined. The system loss factor was analyzed under the different mass ratio, external load and stiffnesss ratio. The displacement characteristics in long and short duration are compared on the different maximum dynamic friction. The result shows that the loss factor changes with the external load and system parameters. And the system with the maximum dynamic frictional force, which corresponds to the maximum loss factor, has better damping characteristics only in a short period of time. The active control of friction can be used in practice to achieve the best damping.