隔振机械结构振动响应工程预报方法

A vibration response engineering prediction method of vibration isolation mechanical structures

在估计隔振机械结构振动传递特性和振动响应过程中,目前的方法都需要已知激励力或激励源的输入阻抗,这对实际工程中大型机械设备来说是很困难的.可以通过将隔振系统输入输出端频响函数相除的方法消去激励力,利用隔振机械结构输入输出端的振动响应估计出振动传递特性,用比例函数来表示,再用不同时刻或不同工况下结构输入端振动响应的监测结果,对结构输出端的振动响应进行预报和监测.研究表明,这种方法适用于单激励源和多源非耦合激励源情况下的振动响应预报,实验结果验证了估计方法的有效性.

In the process of estimating vibration transfer characteristics and vibration response of the vibration isola- tion mechanical structures, the methods known need know the drive force or the input impedance of drive sources. It is very difficult for actual engineering big mechanical equipment to measure. The drive force can be eliminated by dividing between frequency responses of input and output terminals. Using input/output terminal vibration re- sponse, the vibration transfer behavior of vibration isolation mechanical structures can be estimated, with ratio func- tion to say. On other time or in other conditions, again with structure vibration response of the input monitoring re- suits, the output vibration response of structures are predicted and monitored. Research shows that, this method is suitable to predict the vibration response of single drive source and uncoupling multi-sources, the experimental re- sults verify validity of the estimate method.