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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference; 20071022-24; San Diego,CA(US) >THE DYNAMIC PERFORMANCE ANALYSIS OF FOIL JOURNAL BEARINGS CONSIDERING COULOMB FRICTION: ROTATING UNBALANCE RESPONSE
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THE DYNAMIC PERFORMANCE ANALYSIS OF FOIL JOURNAL BEARINGS CONSIDERING COULOMB FRICTION: ROTATING UNBALANCE RESPONSE

机译：考虑库仑摩擦的箔轴承动态性能分析：旋转不平衡响应

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摘要

A significant advantage of foil journal bearings is their superior dynamic performance in rotor systems. However, the evaluation of their dynamic characteristics is still not enough because of the mechanical complexity of the foil structure and the strong nonlinear behavior of friction force. This work presents a nonlinear transient analysis method to predict dynamic performance of foil bearings considering Coulomb friction. In this method, the time dependent Reynolds equation is used to calculate pressure distribution and a finite element method is used to model the bump foil structure. Using this method, the hysteretic behavior of bump foil resulting from the unbalance excitation is observed. And, a number of parametric studies are performed to evaluate effects of design parameters on the unbalance response. The parameters are friction coefficient, bump half wavelength, amount of mass unbalance and number of bump foil strip.
机译：箔式轴颈轴承的一个显着优势是其在转子系统中的出色动态性能。然而，由于箔结构的机械复杂性和强烈的摩擦力非线性行为，对其动力学特性的评估仍然不够。这项工作提出了一种非线性瞬态分析方法来预测考虑库仑摩擦的箔轴承动态性能。在这种方法中，时间相关的雷诺方程用于计算压力分布，而有限元方法则用于对凸箔结构进行建模。使用该方法，观察到由不平衡激励引起的凸块箔的滞后行为。并且，进行了许多参数研究来评估设计参数对不平衡响应的影响。参数为摩擦系数，凸点半波长，质量不平衡量和凸点箔带数量。

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