流体激励诱发轴流泵结构振动计算方法

泵内非定常压力脉动会引发泵体的结构振动,而由压力脉动引发结构振动的计算方法是一个值得研究的问题。通过有限元分析软件对某台立式轴流泵内流体压力脉动引发的结构振动响应进行了仿真计算。将数据处理后与试验值进行了对比,并对该方法准确性和可行性进行了分析。结果表明:该计算方法可以用于已知压力脉动情况下叶频振动加速度的预估,若增加采样点个数,采样频率提高,可以提高叶频高次谐波频率的识别能力。

Calculation Method of Structural Vibration of Axial Flow Pumps Induced by Fluid Pressure Pulsation

Vibration of the pump is partly caused by the pressure pulsation of the unsteady fluid in the pump, and the calculation method is very worth to study. The structure vibration response caused by fluid pressure pulsation of the axial flow pump is simulated through finite element analysis software, the calculation data were compared with the test results after processing, and the accuracy and feasibility of the method was analyzed. The results show that the calculation method can be used for forecasting blade-pass frequency vibration, and if increase the number of sampling points, recognition ability of high order harmonic frequency can be improved.