电阻点焊离心泵叶轮有限元分析

Finite Element Analysis for the Resistance Spot Welded Impeller of the Centrifugal Pump

为准确计算电阻点焊叶轮在流场中的应力及变形情况,借助CAE多物理场协同仿真平台ANSYS Workbench,采用单向流固耦合方法对电阻点焊叶轮进行有限元分析。首先对叶轮有限元模型的网格无关性进行分析,在此基础上,计算了叶轮在设计工况下的等效应力及变形情况,并分析了叶轮最大等效应力及最大总变形随流量的变化情况。计算结果为电阻点焊叶轮结构设计及优化提供有效依据。

To accurately calculate the stress and deformation of the resistance spot welded impeller in the flow field,the finite analysis for the impeller was carried out by means of the CAE co-simulation platform used for the multi-physical fields——ANSYS Workbench,with one-way fluid structure interaction method.Firstly,the sensitivity of the finite element analysis models of the impeller on different mesh density was analyzed.Then,the equivalent（von-Mises） stress and total deformation of the impeller at the design flow rate condition were calculated.Moreover the characteristic of the maximum stress and total deformation at different flow rates was investigated.The results provide effective references to the structural design and optimization for the resistance spot welded impeller.