Analysis on bifurcation of a vibration jumping and engineering control in aero-engine rotor

CHEN Hui-zheng; CHEN Yu-shu

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Analysis on bifurcation of a vibration jumping and engineering control in aero-engine rotor

更新时间：2026-07-07

- Analysis on bifurcation of a vibration jumping and engineering control in aero-engine rotor
- Vol. 28, Issue 12, (2013)
- 作者机构：
  
  哈尔滨工业大学航天学院,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013
- 稿件说明：
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CHEN Hui-zheng, CHEN Yu-shu. Analysis on bifurcation of a vibration jumping and engineering control in aero-engine rotor[J]. 2013, 28(12).
DOI：

CHEN Hui-zheng, CHEN Yu-shu. Analysis on bifurcation of a vibration jumping and engineering control in aero-engine rotor[J]. 2013, 28(12). DOI：

摘要

为研究带挤压油膜阻尼器的航空发动机转子的振动跳跃问题，采用弹性支承的刚性转子模型，结合短轴承π油膜的油膜力模型，建立了系统的动力学方程.采用平均法和非线性动力学中的Chen-Langford（C-L）方法得到了关于轴承系数和转子偏心量参数平面内的转迁集，转迁集将参数平面划分为三个区域，不同区域内具有不同的分岔模式，其中区域Ⅰ为无跳跃现象的理想区域.通过一带有“软特性”非线性特性的附加结构，可以增加区域Ⅰ的范围，减小跳跃区域，扩展了系统的参数优选范围.

Abstract

To investigate the problem of vibration jumping in the aero-engine with squeeze film damper

the aero-engine rotor was simplified as a rigid-rotor with elastic-support.Dynamic equations of the system were established according to the oil-film force model

which were obtained by short bearing approximation and π-film assumption.The transition set of system was obtained by averaging method and Chen-Langford (C-L) method.The parametric plane of bearing coefficient and eccentricity coefficient was divided into three different regions by the transition set.Given different characteristics of bifurcation in each region

the region Ⅰ is an ideal region without jumping phenomenon.Then

an additional structure with "soft characteristic" of nonlinearity could expand the ideal region Ⅰ

decrease the jumping interval and broaden the range of optimization parameter selection.

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