振动系统的当量模态质量振型及其应用

Equivalentmodalmass mode shape of vibration system and its application

提出并论述了多自由度振动结构的当量模态质量振型的概念，它不仅包含了固有位移振型的全部信息，而且还表达了结构的动态质量和动态刚度分布状态，是对现有振动模态分析理论的一个补充。以应用动力吸振器控制轻型客车动力总成弯曲振动的研究为例，分析了当量模态质量振型对结构振动分析与控制的理论意义及实用价值。

A new concept, equivalentmodalmass mode shape of multidegreeoffreedom vibrational structure, is put forward and discussed. The equivalentmodalmass mode shape not only includes all information of the natural displacement mode shape but also shows the distribution of structural dynamic mass and stiffness. The concept is a supplement to the structural modal analysis theory. The significance of the equivalentmodalmass mode shape for theoretical analysis of structural vibration and application to vibration control is shown through a study of bending vibration control of a lightduty truck power train by using a dynamic vibration absorber.