柴油发电机组限位器冲击试验研究

摘要

某弹性安装的柴油发电机组运转时受到了冲击作用，测试了其加速度响应。实测信号是自身运转振动和冲击响应的综合。采用小波分解重构和小波阈值降噪方法分离冲击响应，结果表明冲击信号主要由2部分构成：（1）低频衰减正弦信号，是由底座冲击经过隔振器后传递到柴油机的响应；（2）频率成分复杂的信号，是限位器造成的冲击。计算了限位器冲击信号的冲击响应谱。%A diesel power generating set with vibration isolator and retainer is subjected to shock load-ing under operational condition .Acceleration of diesel engine bracket is measured .Measured signal is complex ,which is composed of operation vibration ,base shock response .Shock response is separated from it using wavelet reconstruction method and wavelet soft threshold de-noising method .Shock re-sponse is composed of low frequency vibration of isolator ,middle frequency vibration caused by retain-er impacting .Shock response spectrum of shock response caused by retainer impacting is calculated , supplying reference for retainer shock investigation .