汽轮机叶根轮缘弹塑性接触有限元应力分析  

Stresses Analysis of Turbine Roots and Rims with a Contact Elasto-plastic FEM

作　　者：谢浩[1] 李锋[1] 孟庆集[1] 

机构地区：[1]西安交通大学,西安710049

出　　处：《汽轮机技术》2003年第6期343-346,共4页Turbine Technology

摘　　要：为提高汽轮机叶根结构的安全性,提出采用弹塑性接触有限元方法对叶根轮缘进行精细的应力分析。文中以一菌型叶根为对象,分析了界面摩擦系数和初始间隙对接触力分布、载荷分配及最大应力的影响。另外,对叉型叶根,文中提出了一种简化的接触模型,并根据计算结果给出更合理的销钉孔载荷分布拟合公式。To improve the reliability of turbine blade roots, a contact elasto-plastic finite element method is proposed to precisely analyze the root stresses. Aimed at a straddle blade root, the influence of the interface friction coefficient and initial clearance on the contact force distribution、load distribution and the maximum stress is analyzed. Furthermore, as for the fork blade roots, a simplified contact model is put forward and according to the calculation results, a more reasonable pin-hole load distribution model is given in this paper.

关 键 词：汽轮机 弹塑性 接触 有限元 

分 类 号：TK263.1[动力工程及工程热物理—动力机械及工程]