期刊文献+

挤压油膜阻尼器—滑动轴承—转子系统非线性动力特性的数值分析及实验研究 被引量:6

NUMERICAL AND EXPERIMENTAL STUDY ON NONLINEAR DYNAMIC BEHAVIOR OF THE FLUID FILM BEARING-ROTOR SYSTEM WITH SQUEEZE FILM DAMPER
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摘要 采用非线性模型 ,研究挤压油膜阻尼器 -滑动轴承 -转子系统的运动稳定性和分岔特性。利用有限元离散变分不等原理和基于线性规划余原理的迭代方法 ,求解自由边值条件下的油膜力。采用模态综合技术中的缩减系统线性自由度的方法 ,并提出基于 Newmark法的预估 -校正 -局部迭代的方法 ,求解系统响应。采用 Poincaré映射法 ,将周期解的确定转化为 Poincaré截面上不动点的确定 ,然后分析不动点的稳定性。最后通过实验转子 ,从实验与数值计算进行对比分析 ,验证了挤压油膜阻尼器的减振特性及其提高系统运动稳定性的特性 。 The stability and bifurcation of the fluid film bearing rotor system with a squeeze film damper are studied using a nonlinear model. The oil film forces under free boundary conditions are solved by finite element discrete variational inequalities and iterative method based on complementary principle in linear programming. The mode synthesis technique is adopted to reduce the linear degree of freedom and the Newmark method combined with predictor corrector algorithm is presented to analyze the response of the reduced system. For determining the periodic solution, the Poincaré mapping is used to discretize the continuous flow, then the fixed point on Poincaré section and its stability are determined equivalent to the periodic solution and its stability respectively. Finally, the system is investigated experimentally by a rotor under the theoretic guidance. The results show that the squeeze film damper is very effective in preventing sub synchronous and non synchronous dynamic response, and the stability of the system can be improved greatly. It is also testified that nonlinear dynamical properties can be analyzed efficiently by the above theory and method.
出处 《航空学报》 EI CAS CSCD 北大核心 2001年第1期42-45,共4页 Acta Aeronautica et Astronautica Sinica
基金 国家自然科学基金资助项目! (5 93 3 5 10 )
关键词 非线性动力特性 挤压油膜阻尼器-滑动轴承-转子 非线性稳定性 数值分析 squeeze film damper fluid film bearing rotor nonlinear stability numerical analysis
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参考文献3

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同被引文献35

  • 1梅庆,欧园霞.支承布置对双支承转子动力特性的影响[J].振动工程学报,2004,17(z1):156-158. 被引量:5
  • 2邬国凡,陈国智,涂孟罴.高速柔性转子动力特性分析与试验研究[J].航空动力学报,2006,21(3):563-568. 被引量:14
  • 3邓旺群,郭飞跃,高德平.航空发动机高速柔性转子动力特性计算[J].振动与冲击,2006,25(5):130-133. 被引量:20
  • 4陈萌,洪杰,朱彬,刘书国.基于实体单元的转子动力特性计算方法[J].北京航空航天大学学报,2007,33(1):10-13. 被引量:15
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