低温罐箱应力分析及结构优化
Stress Analysis and Structure Optimization of Cryogenic Tank
王涛 1董金善 1吴华庆 1柏凯旋1
作者信息
- 1. 南京工业大学机械与动力工程学院,江苏南京 211816
- 折叠
摘要
移动式压力容器中的低温罐箱常用于运输低温液化气体.低温罐箱采用双层结构,在运输过程中受到的惯性力载荷作用导致整体结构应力分布不均,传统的力学理论不能完全适用于低温罐箱应力强度分析.基于静力学理论,应用ANSYS有限元数值仿真软件,分析了低温罐箱整体应力.对低温罐箱进行响应面实验设计及3D响应面分析,总结出内筒体应力受内筒体厚度影响最大,加强圈应力受八点支撑区域加强圈高度影响最大.使用ANSYS响应面优化设计模块,对低温罐箱内筒体和加强圈进行结构优化.优化之后内筒体厚度减薄20％,八点支撑区域加强圈厚度减薄50％,内筒体减重17％,低温罐箱整体质量减少0.8 t,低温罐箱结构应力满足JB 4732-1995《钢制压力容器——分析设计标准(2005年确认)》要求,达到了安全性与经济性兼顾的目的..
Abstract
Cryogenic tanks in mobile pressure vessels are often used to transport cryogenic liquefied gases.The cryogenic tank adopts a double-layer structure,and the stress distribution of the whole structure is uneven due to inertia load in the process of transportation,so the traditional mechanical theory can not be fully applied to the stress strength analysis of the cryogenic tank.Based on the theory of statics,the overall stress level of the cryogenic tank was analyzed by using ANSYS numerical simulation software.According to the response surface experiment design and 3D response surface analysis,it is concluded that the inner cylinder stress is most affected by the inner cylinder thickness,and the stress of the reinforcing ring is most affected by the height of the reinforcing ring in the eight-point support area.ANSYS response surface optimization design module is used to optimize the structure of the cylinder and reinforcing ring in the cryogenic tank.After optimization,the thickness of the inner cylinder is reduced by 20％,the thickness of the reinforcing ring in the eight-point support area is reduced by 50％.The mass of the inner cylinder is reduced by 17％,and the overall mass is reduced by 0.8 tons.The structural stress of the cryogenic tank meets the requirements oftheJB 4732-1995"Steel Pressure Vessels--Design by A nalysis(Confirmed in 2005)",which achieves a balance between safety and economy.
关键词
低温罐箱/应力/分析/响应面优化/数值模拟Key words
cryogenic tank/stress/analysis/response surface optimization/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据