| 支承刚度和轴向位置对某型对转发动机低压转子临界转速的影响 |
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| 引用本文： | 邓旺群,王 毅,聂卫健,何 萍,徐友良,杨 海.支承刚度和轴向位置对某型对转发动机低压转子临界转速的影响[J].航空发动机,2016,42(3):7-11. |
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| 作者姓名： | 邓旺群 王 毅 聂卫健 何 萍 徐友良 杨 海 |
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| 作者单位： | 1. 中国航空动力机械研究所;航空发动机振动技术航空科技重点实验室,湖南株洲412002;2. 中国航空动力机械研究所 |
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| 基金项目： | 航空科学基金（20112108001、2013ZB08001）资助 |
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| 摘 要： | 为提供某型对转发动机低压转子临界转速的设计和调整的理论依据,开展了该转子的临界转速随支承刚度和轴向位置变化规律的研究.以该转子为研究对象,采用有限元法建立了转子动力特性的计算模型,基于不同的支承刚度和轴向位置,运用转子动力学分析软件SAMCEF/ROTOR对低压转子的前4阶临界转速进行了系统的计算分析,揭示了低压转子前4阶临界转速随支承刚度和轴向位置的变化规律.结果表明:支承刚度对低压转子的临界转速有显著影响,而支承轴向位置对临界转速的影响较小.
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| 关 键 词： | 对转发动机 低压转子 临界转速 有限元法 支承刚度 支承轴向位置 |
Influence of Supporting Stiffness and Axial Location on Critical Speeds of a Low-pressure Rotor of a Counter Rotating Engine |
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| Authors: | DENG Wang-qun WANG Yi NIE Wei-jian HE Ping XU You-liang YANG Hai |
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| Abstract: | In order to provide theoretical bases for critical speeds design and adjust of a low-pressure rotor, a study on law of critical speeds with supporting stiffness and axial location was carried out. Taking the rotor as the research object, the calculation model of dynamic features was established by finite element method. The first four orders critical speeds of the rotor were systematically calculated and analyzed by SAMCEF/ROTOR software based on different supporting stiffness and axial location and the laws were revealed. The results show that the influence of the supporting stiffness on critical speeds is significant and the influence of the supporting axial location is slight. |
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| Keywords: | counter rotating engine low-pressure rotor critical speed finite element method supporting stiffness supporting axial location |
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