【摘要】 对三自由度主系统动力吸振器进行理论研究。根据三自由度系统简化模型,利用微分方程的叠加原理,推导三自由度主系统受简谐激励时传到基础上的力与激励力的力传递率解析表达式,得到耦合动力吸振器后系统力传递率解析表达式;根据所推导公式,分析动力吸振器质量比、固有频率比和阻尼比对力传递率的影响,得到吸振器各结构参数的影响规律,解决了三自由度主系统动力吸振器的参数选取问题,为多自由度主系统动力吸振器的研究提供了参考。更多还原

【Abstract】 The theoretical study of a three-degree-of-freedom main system with dynamic vibration absorber was carried out.First,according to the three-degree-of-freedom system simplified model,the analytic expression of the force transfer rate was deduced based on the superposition principle of the differential equation;secondly, the analytic expression of the force transfer rate of the system with dynamic vibration absorber was obtained; finally, according to the formula, the influences of the mass ratio, the natural frequency ratio and the damping ratio on the force transfer rate were analyzed, the influence law of the structural parameters of the vibration absorber was obtained, and the parameter selection problem of the dynamic vibration absorber for the three-degree-of-freedom main system was solved.It provides a reference for study on dynamic vibration absorber for the multi-degree-of-freedom main system.更多还原