固定瓦-可倾瓦组合径向轴承—柔性转子系统非线性运动分析

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (5) : 257-262.

论文

固定瓦-可倾瓦组合径向轴承—柔性转子系统非线性运动分析

吕延军1 于杨冰1 张永芳2 王东1 虞烈3

作者信息 +

Nonlinear Dynamic Analysis of a Flexible Rotor System with a Combination of Fixed-Tilting Pads Journal Bearing Supports

LU Yan-Jun1, YU Yang-Bing1, ZHANG Yong-Fang2, WANG Dong1, YU Lie3

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文章历史 +

摘要

摘要：本文针对流体润滑中具有Reynolds边界条件的非定常Reynolds方程，运用Castelli法求解Reynolds方程，生成了单块轴瓦坐标系下的非线性油膜力数据库。根据固定瓦-可倾瓦组合滑动轴承的结构特点，对单瓦库进行检索、插值和拼装，获得了固定瓦-可倾瓦组合径向滑动轴承的非线性油膜力。针对柔性转子-组合滑动轴承系统，运用自适应步长Runge-Kutta法和Poincaré映射计算了不同支点比下的轴颈的非线性运动轨迹。数值结果表明，转子系统表现出周期解，倍周期解和准周期解等非线性现象，支点比为0.6时的系统性能略优于支点比为0.5时的系统性能。

Abstract

Abstract： Based on the Reynolds equation with Reynolds boundary conditions, the Castelli method was employed to solve the Reynolds equation for oil lubrication upon bearings. By doing so, a profile of nonlinear oil film force of single pad journal bearings is established. According to the structure of combination journal bearings, nonlinear oil film force of combination journal bearing is obtained by retrieval, interpolation, and assembly techniques. As for symmetrical flexible Jeffcott rotor system supported by combination journal bearings, the nonlinear motions of the center of the rotor are calculated by self-adaptive Runge-Kutta method and Poincaré mapping during different rotational speed tests under different pivot ratio. Numerical results show that the performance of system becomes slightly better when the pivot ratio changes from 0.5 to 0.6, and reveal periodic, period-doubling, quasi-periodic motion, etc. nonlinear behaviors.

导出引用

吕延军于杨冰张永芳王东虞烈. 固定瓦-可倾瓦组合径向轴承—柔性转子系统非线性运动分析[J]. 振动与冲击, 2011, 30(5): 257-262

LU Yan-Jun;YU Yang-Bing;ZHANG Yong-Fang;WANG Dong;YU Lie. Nonlinear Dynamic Analysis of a Flexible Rotor System with a Combination of Fixed-Tilting Pads Journal Bearing Supports[J]. Journal of Vibration and Shock, 2011, 30(5): 257-262