| 不平衡质量的大小和分布对柔性转子—轴承系统稳定性的影响 |
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| 引用本文： | 李志刚,张直明.不平衡质量的大小和分布对柔性转子—轴承系统稳定性的影响[J].振动与冲击,1997,16(1):15-19. |
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| 作者姓名： | 李志刚 张直明 |
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| 作者单位： | 上海大学轴承研究院
(李志刚)，上海大学轴承研究院(张直明) |
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| 基金项目： | 国家自然科学基金59175166课题，上海市高教局91B1课题的资助 |
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| 摘 要： | 本文详细考察了滑动轴承支承的转子不平衡质量的大小及分布对系统稳定性的影响.大量计算结果除支持了有关文献中关于刚性转子不平衡质量的大小对系统稳定性影响的结论外,更重要的还发现:对柔性转子而言,不平衡质量的分布也是一个重要的影响因素,其程度可能要超过不平衡质量的大小的因素.计算结果表明:当转子不平衡量所引起的强迫振动的挠曲线与转子的一阶振型相吻合或接近时,对转子的稳定性是不利的.而当转子强迫振动的挠曲线与转子的二阶或三阶振型相吻合或接近时,增加不平衡量会提高系统的稳定性.
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| 关 键 词： | 非线性分析 不平衡响应 失稳转速 滑动轴承 |
THE EFFECT OF MAGNITUDE AND DISTRIBUTION OF UNBALANCE ON STABILITY OF FLEXIBLE ROTOR JOURNAL BEARING SYSTEM |
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| Li Zhigang Zhang Zhiming.THE EFFECT OF MAGNITUDE AND DISTRIBUTION OF UNBALANCE ON STABILITY OF FLEXIBLE ROTOR JOURNAL BEARING SYSTEM[J].Journal of Vibration and Shock,1997,16(1):15-19. |
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| Authors: | Li Zhigang Zhang Zhiming |
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| Abstract: | This paper studies in detail the effect of magnitude and distribution of rotor unbalance on the stability of rotor-journal bearing system. Systematically calculated results not only support the conclusion in certain literature about the effect of magnitude of unbalance of rigid rotor on system stability, but also show that for flexible rotor the distrbution of unbalance is also an important factor, possibly more important than the factor of unbalance magnitude. It is concluded that it will be unfavorable for system stability if the dynamic deflection shape of forced vibration caused by unbalance mass conforms with the first vibration mode of the rotor, whereas the system stability will be improved by properly increasing unbalance when the dynamic deflection shape of forced vibration conforms with the second or higher vibration mode of the rotor. |
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| Keywords: | nonlinear analysis unbalance responds stability journal bearing |
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