摘 要：对某型往复式冰箱压缩机的振动进行了有限元数值模拟，研究了曲轴-连杆-活塞运动系统产生的机械激励引起的压缩机振动响应。研究表明，曲轴-连杆-活塞运动系统是压缩机低频振动的主要激励来源，气体力主要引起压缩机泵体的水平扭转振动。通过仿真结果和试验的对比，验证了数值模拟方法应用于压缩机振动响应分析的可行性。通过数值模拟，可得到机械激励引起的壳体表面振速分布，为压缩机的机械噪声预测提供参考。

Abstract：The FEM method is used to study the vibration response of one reciprocating compressor due to the mechanical excitations caused by the crank-connecting rod-piston system. It is shown that the crank-connecting rod-piston mechanism system is the main excitation source for low-frequency vibration of the reciprocating compressor, and the gas force is the main reason for the horizontally torsional vibration of the pump body. Some tests are implemented to validate the feasibility of the FEM method in the dynamic response analysis of the reciprocating compressor. The normal velocity distribution on the compressor shell due to the mechanical excitations can be obtained by FEM method, on the basis of which the prediction of the mechanical noise becomes possible for the reciprocating compressor.