| 汽轮机带鳍状结构叶片组动力特性的有限元分析 |
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| 引用本文： | 李建中 秦飞. 汽轮机带鳍状结构叶片组动力特性的有限元分析[J]. 工程力学, 1997, 14(4): 68-75 |
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| 作者姓名： | 李建中 秦飞 |
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| 作者单位： | [1]清华大学工程力学系 [2]北京重型电机厂 |
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| 摘 要： | 本文在对汽轮机叶片组进行动力分析时，针对结构旋转周期性的特点，采用复约束法有效地减缩了系统自由度；在考虑离心力对旋转结构动力特性的影响时，引入了非线性的几何关系，并用有限元的方法计算了结构的动频；对于带鳍状结构的叶片，本文给出了对叶片间特殊约束的处理方法，并计算了额定转速下叶片间约束对叶片扭转角及叶片组动频的影响
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| 关 键 词： | 汽轮机叶片，旋转周期结构，复约束法，动频 |
FINITE ELEMENT ANALYSIS FOR DYNAMIC BEHAVIOR OF GROUP OF STREAM TURBINE BLADE WITH FIN HEAVE |
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| Abstract: | This paper considers the steam turbine blade group as a rotationally periodic structure and the complex constraint has been induced. The effect of the centrifugal force to the dynamic frenquency has been considered by introducing large deflection equation. A method has been given to introduce the special constraint between the fin heaves of every blade during dynamic analysing. |
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| Keywords: | blade rotationally periodic structure complex constraint dynamic frequency |
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