大型水轮机蜗壳结构动静力分析  

Structural study on the spiral case of large hydraulic turbines

作　　者：阳芳[1] 伍鹤皋[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2004年第5期46-49,共4页Engineering Journal of Wuhan University

基　　金：教育部优秀青年教师资助项目(编号:1200105).

摘　　要：通过三维有限元计算,对某水电站大型水轮机蜗壳进行了三种结构型式的动静力分析,分析了外围混凝土的应力分布情况、承载比以及蜗壳结构的自振特性.结果表明:充水保压蜗壳具有混凝土内应力均匀、拉应力值较小、承载比明确、整体结构刚度较大等优点,有利于机组的安全稳定运行,对于大型水轮机蜗壳而言是一种比较好的结构型式.Through the 3D finite element method, a static and dynamic analysis, including the stress distribution rules, load bearing ratio of the outer reinforced concrete and the natural vibration mode, has been performed on three structural patterns of the spiral case of a hydropower plant. The results indicate that it is beneficial for the safe and steady operation of turbine units by adopting the spiral case with keeping constant internal water pressure during construction because of its advantages of more uniform distribution of stress, less tensile stress, and massive structural rigidity. So the spiral case with keeping constant internal water pressure during construction is more feasible for the large hydraulic turbines.

关 键 词：蜗壳 充水保压 垫层 有限元计算 承载比 

分 类 号：TV31[水利工程—水工结构工程]