基于ANSYS再沸器管口接管应力的仿真分析

Simulation Analysis of Nozzle Stress of Reboiler Nozzle Based on ANSYS

以某一型号再沸器管口接管为例,采用ANSYS有限元分析方法,构建接管管口有限元模型。根据再沸器接管管口的受力情况确定模型边界条件和载荷条件,通过有限元仿真计算获得管口接管处的TRESCA等效应力云图,然后根据JB4732《钢制压力容器——分析设计规范》进行应力强度评定。结果表明结构的最大应力(317.689 MPa)出现在接管与筒体连接处筒体一侧的外表面,接管应力强度满足工况要求,研究结果验证了设计的安全性和合理性,为下一步再沸器管口接管结构优化设计提供了理论基础。

Taking a reboiler nozzle as an example,we constructed a finite element model of the nozzle by ANSYS finite element analysis method.The boundary conditions and loading conditions were determined according to the force of the reboiler nozzle.The contour plots of TRESCA equivalent stress at the nozzle connection was obtained.Finally,the stress intensity was evaluated according to the specification JB4732"Steel Pressure Vessel——Analysis and Design Code".The results show that the maximum stress(317.689 MPa)of the structure occurs on the outer surface side of the cylinder at the connection of the nozzle,and the stress intensity of the nozzle satisfies requirements of practical applications.The research results validate the safety and rationality of the nozzle's design.Furthermore,it can provide a theoretical basis for the optimal structural design of the reboiler nozzle in the future.