基于COMSOL有限元分析的滤芯外壳结构优化

Optimization of Filter Element Shell Structure Based on COMSOL Finite Element Analysis

针对滤芯外壳测试环境苛刻的要求,以滤芯外壳为研究对象,运用SolidWorks三维软件对滤芯外壳进行建模,通过COMSOL软件对滤芯外壳结构进行有限元分析,探究了滤芯外壳在爆破工况测试条件下的应力和变形情况。经理论分析与实验测试,结果表明:滤芯外壳的最大应力峰值出现在根部直径突变位置,相对较为集中,最大应力为198 MPa,此时的变形量为8.78 mm,超过材料许用应力;通过增大圆角半径和厚度对滤芯外壳进行优化,优化后滤芯外壳的最大应力为123 MPa,相比优化前减小了37.8%,在材料的许用应力之内,此时的最大变形量为6.33 mm,相比优化前减小了27.9%;优化前的滤芯外壳最大爆破压力为2.86 MPa,优化后的滤芯外壳最大爆破压力为3.47 MPa,相比优化前提高了17.5%,达到了目标爆破压力3.2 MPa,满足设计要求。该研究结果为后期滤芯外壳的结构设计提供了理论基础。

According to the harsh requirements of the test environment of the filter element shell,taking the filter element shell as the research object,the filter element shell is modeled by SolidWorks 3D software,and the finite element analysis of the filter element shell structure is carried out by COMSOL software to explore the stress and deformation of the filter element shell under the test conditions of blasting conditions.Through theoretical analysis and experimental test,the results show that the maximum stress peak of the filter element shell appears at the sudden change of the root diameter,which is relatively concentrated.The maximum stress is 198MPa,and the deformation is 8.78mm,which exceeds the allowable stress of the material;by increasing fillet radius and thickness to optimize the filter shell,the maximum stress of the optimized filter element shell is 123MPa,which is 37.8%less than that before optimization.Within the allowable stress of the material,the maximum deformation is 6.33mm,which is 27.9%less than that before optimization;the maximum bursting pressure of the filter element shell before optimization is 2.86MPa,and the maximum bursting pressure of the filter element shell after optimization is 3.47MPa,which is 17.5%higher than that before optimization,reaching the target bursting pressure of 3.2MPa,meeting the design requirements.The research results provide a theoretical basis for the structural design of the filter element shell in the later stage.