有限元计算网格划分对汽轮机转子应力计算结果的影响  

Effects of Mesh Generation on Stress Calculation of Steam Turbine Rotors Using Finite Element Method

作　　者：邓志成[1] 杨宇[1] 汪勇[1] 葛炼伟 

机构地区：[1]上海发电设备成套设计研究院,上海200240 [2]中核核电运行管理有限公司,嘉兴314300

出　　处：《发电设备》2013年第6期379-381,共3页Power Equipment

基　　金：上海市青年科技启明星计划项目(12QB1401800);国核员工自主创新项目(SNP-KJ-CX-2013-21)

摘　　要：针对某型号亚临界汽轮机高、中压转子在稳态额定负荷工况下,采用不同单元形状与网格密度进行有限元计算,得出汽轮机高、中压转子强度薄弱部位等效应力的计算结果。计算分析结果表明:网格划分方式与网格密度不同,计算得出的转子等效应力相差较大。研究结果为提高汽轮机转子应力的计算准确度提供了依据和方法。Aiming at the high-and medium-pressure rotor in a certain sub-critical pressure turbine, the equivalent stress of weak parts in the rotors was calculated under steady-state conditions at rated load using finite element method with different element shapes and grid densities. Calculation and analysis results show that the calculated equivalent stress varies greatly with the mesh generation mode and grid density. This may serve as a reference for accuracy improvement in stress calculation of steam turbine rotors.

关 键 词：汽轮机 高中压转子 网格划分 等效应力 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]