| 迷宫密封—滑动轴承—转子系统的非线性动力稳定性 |
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| 引用本文： | 李松涛,许庆余.迷宫密封—滑动轴承—转子系统的非线性动力稳定性[J].航空学报,2003,24(3):226-229. |
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| 作者姓名： | 李松涛 许庆余 |
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| 作者单位： | 西安交通大学建力学院,陕西,西安,710049 |
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| 基金项目： | 国家自然科学基金资助项目(50275113) |
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| 摘 要： | 研究迷宫密封—滑动轴承—转子系统在不平衡量激励下的非线性动力稳定性。存在不平衡量的转子在旋转过程中受到周期激励,低转速时,转子作与激励同频率的周期运动,随着转速的提高,达到一定阈值时周期运动开始失稳。对迷宫密封的气动力采用Muszynska 非线性力学模型,支承采用短轴承,用打靶法求解转子运动周期解,并根据Floquet 理论分析了周期解的稳定性及失稳后的非线性动力学行为。
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| 关 键 词： | 非线性振动 稳定性 转子 迷宫密封 滑动轴承 打靶法 |
| 文章编号： | 1000-6893(2003)03-0226-04 |
| 修稿时间： | 2002年6月19日 |
Nonlinear Dynamic Stability of Labyrinth Seal-Sliding Bearing-Rotor System |
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| LI Song-tao,XU Qing-yu.Nonlinear Dynamic Stability of Labyrinth Seal-Sliding Bearing-Rotor System[J].Acta Aeronautica et Astronautica Sinica,2003,24(3):226-229. |
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| Authors: | LI Song-tao XU Qing-yu |
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| Institution: | Dept.of Architectural Engineering and Mechanics; Xi'an Jiaotong University; Xi'an 710049; China |
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| Abstract: | The nonlinear dynamic stability of labyrinth seal-sliding bearing-unbalanced rotor systems is studied in this paper. Under the periodic excitation of rotor unbalance, the whirling vibration of a rotor is synchronous if the rotation speed is below the stability threshold, whereas the vibration becomes severe and asynchronous which is called unstable if the rotation speed exceeds the threshold. The Muszynska model of the seal force, short bearing and shooting method are used to investigate synchsonous solution of the dynamic equation of the rotor system, and then based on Floquet theory the stability of synchronous solution and unstable dynamic behaviors of the system are analyzed. |
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| Keywords: | nonlinear vibration stability rotor labyrinth seal sliding bearing shooting method |
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