| 不平衡线性转子-轴承系统的非平稳地震激励响应分析 |
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| 引用本文： | 祝长生,陈拥军,朱位秋. 不平衡线性转子-轴承系统的非平稳地震激励响应分析[J]. 计算力学学报, 2006, 23(3): 285-289 |
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| 作者姓名： | 祝长生 陈拥军 朱位秋 |
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| 作者单位： | 浙江大学,电气工程学院,杭州,310027;浙江大学,力学系,杭州,310027 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 给出了受随机地震激励的线性转子-轴承系统动力响应的有效分析方法。应用虚拟激励法和数值积分法,采用Kanai-Tajimi地震模型,对一个四自由度非对称的刚性转子-轴承系统在地震激励和谐波激励联合作用下的位移响应、位移响应谱密度及响应时变方差进行了分析。讨论了不同转速对位移响应时变方差的影响和不同采样角频率对位移响应时变方差曲线的影响。
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| 关 键 词： | 转子-轴承系统 随机振动 虚拟激励法 地震激励 谐波激励 |
| 文章编号： | 1007-4708(2006)03-0285-05 |
| 修稿时间： | 2004-07-13 |
Response analysis on linear imbalanced rotor-bearing system under nonstationary random seismic excitation |
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| ZHU Chang-sheng,CHEN Yong-jun,ZHU Wei-qiu. Response analysis on linear imbalanced rotor-bearing system under nonstationary random seismic excitation[J]. Chinese Journal of Computational Mechanics, 2006, 23(3): 285-289 |
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| Authors: | ZHU Chang-sheng CHEN Yong-jun ZHU Wei-qiu |
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| Abstract: | An effective analysis method for a linear rotor-bearing system subjected to random seismic excitation is presented in this paper.The pseudo excitation method and Runge-Kutta integration scheme are used in a numerical example.By means of Kanai-Tajimi seismic model,displacement response,the power spectral density of displacement response and time-dependent variance of rotor's displacement response under random seismic and harmonic excitations for a rotor-bearing system with four degrees of freedom are analysed.Influence of rotational speed on the time-dependent displacement response variance and influence of sampling frequency on the time-dependent displacement response variance curve are discussed. |
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| Keywords: | rotor-bearing system random vibration pseudo excitation method seismic excitation harmonic excitation |
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