框架结构排缸的刚性分析和结构优化  

The Rigidity Analysis and Structural Optimization of the Exhaust Hood with Frame Structure

作　　者：马利 朱雷 曹敏 杨世华 吴辉贤[1] Ma Li;Zhu Lei;Cao Min;Yang Shihua;Wu Huixian(Hangzhou Chinen Steam Turbine Power Co.,Ltd,Hangzhou 310022,China)

机构地区：[1]杭州中能汽轮动力有限公司,杭州310022

出　　处：《化工与医药工程》2022年第3期49-53,共5页Chemical and Pharmaceutical Engineering

基　　金：新产品开发,科研技术攻关项目(X21-23-01)。

摘　　要：应用有限元法对常规大尺寸焊接排缸进行数值仿真,分析过程中发现排缸外部筋板相互连接,形成整体框架的排缸结构,其刚性得到明显改善。根据此分析结论设计出一种框架结构的焊接排缸,此焊接排缸的结构刚性由框架决定,面板仅起密封作用。对此焊接排缸进行有限元分析和结构优化。优化后的排缸其结构应力和变形都满足设计和装配检验要求,解决了该类排缸在安装和运行时因结构刚性不足造成的问题。The finite element method was applied to the numerical simulation of the conventional large-size welded exhaust hood for steam turbine.During the analysis,it was found that the outer ribs of the exhaust hood were connected with each other to form an integral frame,and the rigidity of the exhaust hood structure was significantly improved.According to this analysis conclusion,a welded exhaust hood with frame structure was designed.The structural rigidity of the welded exhaust hood was determined by the frame,and the panel only plays a sealing role.The finite element analysis and structural optimization of the welded exhaust hood were carried out.The structural stress and deformation of the optimized exhaust hood met the requirements of design and assembly inspection,and the problem caused by insufficient structural rigidity during installation and operation was solved.

关 键 词：排缸 框架结构 刚性分析 有限元法 结构优化 

分 类 号：TK263.1[动力工程及工程热物理—动力机械及工程]