冲击作用下基座响应的冲击谱简便计算方法研究

冲击作用下设备安装基座响应的冲击余谱的一般计算方法是先计算冲击作用下设备安装基座的时域响应,再计算安装基座响应的冲击余谱.本文提出了一种简便计算方法,该方法先计算冲击信号冲击余谱,然后利用该冲击余谱及安装基座的传递函数求得安装基座响应的冲击余谱.从而对于一些简单冲击信号可大大提高计算速度.在低频段,可采用有限元法获得安装基座的传递函数;在高频段,可采用统计能量法获得安装基座的传递函数.

A Simple Calculation Method of Residual Shock Response Spectrum of the Base Shock Response

The usual way to calculate the residual shock response spectrum of the base shock response is as follows: the time domain shock response of the base is calculated firstly, then the residual shock response spectrum of the base response is calculated. A more easy calculation method is brought forward in this paper. In that method one firstly calculates the remaining shock response spectrum of the shock force applied on the base, and then one uses it along with the base transfer function to get the residual shock response spectrum. For low frequency problems finite element method is used to get the transfer function, for high frequency problems statistical energy analysis method is used to get the transfer function.