复杂耦合隔振系统的实用解研究

针对工程实际中的复杂柔性耦合系统 ,本文对建立在柔性基础 弹性浮筏上的隔振系统应用子系统导纳法进行分析 ,推导了耦合系统动态功率流传递计算公式。在研究中 ,将浮筏和基础的基频与被隔振机组固有频率之比作为特性参数 ,对系统在不同频率比下的传递特性进行了计算研究 ;针对计算结果 ,分析了浮筏的弹性和基础的柔性对耦合系统的传递功率流的影响 ,给出了可以将基础或浮筏当作刚体来处理的弹性变化范围。

The Study on Practical Solution of Complicated Coupling Vibration-isolating System

In this paper the power flow through a raft vibration-isolating system transmitted into the flexible foundation is calculated based on the mobility method.Taking the ratio of raft's or foundation's resonance frequency to its upper isolated sub-system'as the parameter,the system's isolating performances under different values are analyzed.The effects resulted from the flexibilities of the raft and foundation are studied,and the ratios'range which indicate the raft or the foundation can be treated as rigid element are given.