基于模态分析的汽轮机叶片有限元拓扑结构优化  

Topological Structure Optimization of Finite Element based on Modal Analysis about Steam Turbine Blade

作　　者：陈江龙[1] 盛德仁[1] 陈坚红[1] 李蔚[1] 任浩仁[1] 

机构地区：[1]浙江大学

出　　处：《电站系统工程》2005年第1期51-53,共3页Power System Engineering

摘　　要：针对汽轮机叶片疲劳损伤产生原因,提出了基于模态分析的叶片有限元拓扑结构优化的基本理论、模型和计算过程。以 300 MW汽轮机低压缸变截面叶片为例,进行了具体的优化分析和计算,并对汽轮机经济性(级效率和功率)影响作了讨论。计算分析表明,应用有限元法对叶片进行结构改进是可行的,也可为汽轮机叶片结构设计提供理论依据。Basic theories, model and computational process of topological optimization of finite element about steam turbine blade based on the modal analysis were put forward for the reason to the fatigued crackle of blade. Analyzing of data from 300MW steam turbine’s low pressure casing of turbo-blade showed that the method of topological optimization of the finite element can offer the important theoretical basis to structural design of steam turbine blade.

关 键 词：汽轮机叶片 低压缸 300MW汽轮机 级效率 模态分析 经济性 优化分析 有限元 变截面 结构设计 

分 类 号：TM621[电气工程—电力系统及自动化] TK267[动力工程及工程热物理—动力机械及工程]