大型冷库液氨储罐结构强度计算分析与校核

Structural strength calculation and analysis of liquid ammonia storage tank for large cold storage

针对大型冷库液氨储罐的安全设计问题,应用SolidWorks、ANSYS分别对液氨储罐进行了三维建模和有限元计算,考虑了储罐自重、液货自重和内外压力载荷,进行了储罐整体变形和应力分析,并采用应力线性化方法重点考核了应力集中区域的强度情况。仿真结果表明:储罐的最大应力集中在鞍座与罐体相连的附件,对应力集中区域进行线性化仿真计算后,一次局部薄膜应力和组合应力均在许用值范围内,满足《钢制压力容器——分析设计标准》(JB4732—1995)要求,为相关压力容器的设计提供了参考。

For the safety design of large cold storage liquid ammonia storage tank,SolidWorks and ANSYS were applied to the liquid ammonia storage tank for three-dimensional modeling and finite element calculation,considering the self-weight of the tank,the self-weight of the liquid cargo and the internal and external pressure load,the overall deformation and stress analysis of the tank,and the stress linearization method was used to focus on the assessment of the strength of the stress concentration region.The simulation results show that:the maximum stress of the tank is con-centrated in the attachment connected with the saddle and the tank,the local film stress and combined stress in the stress concentration area are less than the allowable value,and the strength check meets the requirements of JB 4732—1995"Steel Pressure Vessel—Design by Analysis",which provides a reference for the design of related pressure ves-sels.