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中文摘要：
为了研究摩擦减振特性，对给定二自由度摩擦系统的动力学方程进行分析，利用能量守恒原理和阻尼减振原理给出系统摩擦阻尼的损耗因子。通过分析不同外载荷、质量比和刚度比对损耗因子的影响，以及对不同最大动摩擦力时质量体的长、短时程位移变化特性进行比较。结果说明损耗因子随外载荷和系统结构参数不断变化；最大损耗因子对应的最大动摩擦力作用系统，只有在短时间内有较好的减振特性，在实际中可以采用主动控制摩擦力的方法达到最佳减振效果。
英文摘要：
To study friction damping characteristics, a dynamic equation of two-DOF friction system is analyzed. Based on the principle of conservation of energy and the principle of damping, the loss factor of the friction damping system is defined. The system loss factors are analyzed for different mass ratio, external load and stiffness ratio. The displacement characteristics for long and short periods are compared for different maximum dynamic frictions. The result shows that the loss factor changes with varying of the external load and system parameters. And the system with the maximum dynamic frictional force corresponding to the maximum loss factor has good damping characteristics only in a short period of time. The active control of friction can be used to achieve the best damping effect.
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