摘要
真空容器是石油、化工等行业中常见的设备之一,与内压容器不同,真空容器往往发生的是稳定性破坏。文中首先采用有限元软件ANSYS Workbench对DN22000 mm的真空容器进行了特征值屈曲分析,结果表明:其外压承载系数为17.427,远大于外压安全系数2.5。进而采用Response Surface Optimization模块对该真空容器进行优化设计,分析了外压承载系数、容器质量随穹顶壁厚和筒体壁厚的变化规律,以及外压承载系数、容器质量、应力随穹顶辐射筋数量的变化规律。最终确定穹顶壁厚取20 mm、筒体壁厚取22 mm、穹顶辐射筋取16个,优化后结构较最初结构质量减小了83140 kg,减小了17.02%,并且稳定性满足ASME规范要求,实现了容器轻量化的设计目标,从而显著降低制造成本。
The vacuum vessel,as a common equipment in petroleum,chemical and other industries,often suffers stability failure,which is different from those internal⁃pressure vessels.In this article,firstly,the analysis is conducted on the DN22000 mm vacuum vessel’s eigenvalue buckling with the help of the finite⁃element software ANSYS Workbench.The results show that the external⁃pressure bearing coefficient is 17.427,which is much greater than the external⁃pressure safety factor coeffi⁃cient of 2.5.Then,the Response Surface Optimization module is used to optimize the vacuum vessel;efforts are made to explore the variation rules of the external⁃pressure bearing coefficient and the vessel mass changing with the dome wall thickness and the cylinder wall thickness,as well as the variation rules of the external⁃pressure bearing coefficient,the vessel mass,and the vessel stress changing with the number of the radial ribs in the dome.Finally,it is determined that the dome wall thickness is taken as 20 mm,the cylinder wall thickness is taken as 22 mm,and the number of the radiation ribs in the dome is taken as 16.Compared with the original structure,the optimized structure reduces by 83140 kg,a reduction of 17.02%,with its stability meeting the require⁃ments of ASME code,which both realizes the vessel’s lightweight design and significantly reduces the manufacturing cost.
作者
段成红
吴港本
罗翔鹏
DUAN Chenghong;WU Gangben;LUO Xiangpeng(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029)
出处
《机械设计》
CSCD
北大核心
2024年第5期29-33,共5页
Journal of Machine Design
