机器转动自由度的结构声功率流的预测

Prediction About Structure-Borne Sound Power Flow Emitted from Freedom of Motion in Machinery

本文利用机器的自由源角速度 ,水泥地板力矩导纳和隔振支架的劲度系数预测了两个水平方向转动自由度的结构声功率流 ,并与垂直方向平动自由度的结构声功率流进行了比较 .预测结果表明 :虽然转动自由度的功率流在所研究的频率范围内均小于平动自由度功率流 ,但是在 5 0 0

This paper,by reference to free source angular velocity,point motion mobility of floor and the stiffness efficiency vibration of isolation,conducts a prediction about the structure borne sound power flows emitted from freedom of motion in machinery in two horizontal directions in comparison with those from translational motion in vertical direction.Results obtained show that although in the frequency ranges under investigation the former is lower than the latter,yet the emission in frequency range below 500 Hz is not to be neglected.