基于Abaqus的薄膜阀壳体强度分析

Strength Analysis of Membrane-valve Shell Based on Abaqus

为了校核薄膜阀在工作压力1.5 MPa下设计是否可靠,基于Abaqus有限元分析软件,建立薄膜阀有限元模型,以最大应力为失效判据,计算其在工作压力下的结构强度。结果表明:ADC12材料壳体在1.5 MPa工作压力下,法兰处的最大应力199.9 MPa超过材料屈服强度170 MPa,产生塑性变形;M6连接螺栓在5000 N的最大预紧力下的轴向应力为96.39 MPa,满足API 6A标准规定要求;上下壳体最大缝隙位于相邻螺栓连接的法兰之间,其值为0.2258 mm,大于A系列O形圈截面直径公差0.20 mm,不满足密封设计要求。

In order to check whether the membrane valve is designed to be reliable under the working pressure of 1.5 MPa,a finite element model of the membrane valve is established based on the Abaqus finite element analysis software,and the maximum stress is used as the failure criterion to calculate the structural strength under the working pressure.The results show that:under the working pressure of 1.5 MPa for ADC12 material,the maximum stress at the flange of 199.9 MPa exceeds the yield strength of the material by 170 MPa,resulting in plastic deformation;the axial stress of the M6 connecting bolt under the maximum preload of 5000 N is 96.39 MPa,which can meet the requirements of the API 6A standard;the maximum gap between the upper and lower shell is located between the adjacent bolted flanges,and its value is 0.2258 mm,greater than the cross section diameter tolerance of A series O-ring 0.20 mm,which does not meet the seal design requirements.