| 旋转叶片频率转向与振型转换特性 |
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| 引用本文： | 王建军,卿立伟,李其汉.旋转叶片频率转向与振型转换特性[J].航空动力学报,2007,22(1):8-11. |
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| 作者姓名： | 王建军 卿立伟 李其汉 |
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| 作者单位： | 北京航空航天大学,能源与动力工程学院,北京100083 |
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| 基金项目： | 国家自然科学基金
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航空基础科学基金 |
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| 摘 要： | 通过对典型旋转叶片的有限元分析,讨论了旋转叶片动频特性的"频率转向"和"振型转换"问题,尤其是关于多模态耦合的复杂"频率转向"和"振型转换"的现象和特点.首先讨论了旋转叶片动频特性中的两阶模态间"频率转向"和"振型转换"问题,说明了这种耦合振动问题的机理,然后研究了多阶模态相互耦合所导致的复杂"频率转向"和"振型转换"现象,对其基本特点进行了详细的分析和说明.
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| 关 键 词： | 航空、航天推进系统 旋转叶片 多模态耦合 多频率转向 多振型转换 旋转叶片 频率 转换特性 rotating blades interaction mode shape 有限元分析 相互耦合 多阶 研究 机理 振动问题 多模态耦合 现象 动频 |
| 文章编号： | 1000-8055(2007)01-0008-04 |
| 收稿时间： | 2005/10/18 0:00:00 |
| 修稿时间： | 2005年10月18 |
Frequency veering and mode shape interaction for rotating blades |
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| WANG Jian-jun,QING Li-wei and LI Qi-han.Frequency veering and mode shape interaction for rotating blades[J].Journal of Aerospace Power,2007,22(1):8-11. |
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| Authors: | WANG Jian-jun QING Li-wei and LI Qi-han |
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| Institution: | School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | By the results from direct finite element analyses,frequency veering and mode shape interaction of rotating blade are studied,especially emphasis is placed on the multi-mode frequency veering and shape interaction.Firstly the finite element model of a simple geometry blade is given and the mode shapes and natural frequencies of this simple blade are calculated as a function of rotational speed using the ANSYS finite element program.Then frequency veering and shape interaction for the multi-mode and two-mode of rotating blades are discussed respectively.It is shown that except for the frequency veering problem with two-mode coupling,the multi-mode frequency veering and mode shape interaction of rotating blade are more complicate and must be further researched deeply. |
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| Keywords: | aerospace propulsion system rotating blade multi-mode coupling multi-frequency veering multi-mode shape interaction |
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