| 碰摩转子的非线性动力学特性研究 |
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| 引用本文： | 孙政策,徐健学.碰摩转子的非线性动力学特性研究[J].动力工程,2003,23(1):2205-2209,2178. |
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| 作者姓名： | 孙政策 徐健学 |
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| 作者单位： | 西安交通大学,非线性动力学研究所,西安,710049 |
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| 基金项目： | 国家自然科学基金资助项目 (重大 19990 5 10 ) |
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| 摘 要： | 文中应用非线性动力学现代理论对建立的碰摩转子模型进行了研究，结果表明，转速变化时，系统具有拟周期，周期，混沌运动交替出现的现象，且在不同的混沌区吸引子表现为不同的形状，Poinare截面上的高维拟周期轨道表现出特殊的封闭形式。同时，还揭示了阻尼对系统复杂运动的抑制作用和非线性刚度使系统运动进一步复杂化等现象。这些现象对于准确诊断转子故障和进一步了解转子的非线性特征都有很大的参考价值。
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| 关 键 词： | 非线性动力学 转子 碰摩现象 模型 故障诊断 电站 汽轮机 |
| 文章编号： | 1000-6761(2003)01-2205-05 |
Research on Nonlinear Dynamical Characteristics of a Rotor System with Rub-Impact |
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| SUN Zheng ce,XU Jian xue.Research on Nonlinear Dynamical Characteristics of a Rotor System with Rub-Impact[J].Power Engineering,2003,23(1):2205-2209,2178. |
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| Authors: | SUN Zheng ce XU Jian xue |
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| Abstract: | In this paper, the mathematic model of the rotor system with rub impact is analyzed by applying modern nonlinear dynamics theory. As a result, it is indicated that the motion of the rotor system alternates among the periodic, chaotic and quasi periodic vibrations, as rotating speed increases. Meanwhile, the different chaotic regions show the different attractor configurations. Effect of damping on restraining complicated responses is shown by the bifurcation diagrams, in addition to effect of nonlinear stiffness on encouraging complicated responses. The phenomena are great meanings to accurately diagnose rub impact failure, further know nonlinear characteristics of the rotor system. Figs 7 and refs 9. |
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| Keywords: | chaos bifurcation impacting rub impact failure |
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