弹性基础上单层隔振系统功率流传递特性研究

Research on transmission characteristics of power flow in single stage vibration isolation system on flexible base

利用振动能量的传递与变化来描述系统的振动状态具有诸多优点,功率流作为隔振系统中能量传播的一个衡量指标,可以方便地分析机械振动的传播路径与隔振系统的隔振效果。本文将柔性基础上的单层隔振系统简化为四边简支薄板基础上的单层隔振系统模型。通过对模型的分析和数值计算,可以考察各变量对于隔振效果的影响,通过不同的方式来评估隔振系统的隔振效果,将功率流概念运用到隔振效果的评估中,分析其中的差别和相似点,为隔振系统的设计与评估提供指导。

It has a lot of advantages to describe system＇s vibration state from the perspective of energy. We can analyze the transmission characteristic of vibration and judge the vibration isolation effect conveniently by using the concept of power flow. In this paper, a single stage vibration isolation system on flexible base is simplified as a single stage vibration isolation system on simply supported plate. By using this model and numerical calculation, we can analyze each variable＇s ef- fect to the vibration system. By using different method to evaluate the effect of the vibration reduction system with or without the concept of power flow, we can analyze the similarities and differences between them and provide guidance for the following work.