STUDY ON NONLINEAR DYNAMICS OF ASYMMETRICAL SUPPORTED ROTOR UNDER INFLUENCE OF HEELING ANGLE

LI Mo; LIU YongBao; WANG Qiang

doi:10.16579/j.issn.1001.9669.2020.02.006

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STUDY ON NONLINEAR DYNAMICS OF ASYMMETRICAL SUPPORTED ROTOR UNDER INFLUENCE OF HEELING ANGLE

更新时间：2022-09-22

- STUDY ON NONLINEAR DYNAMICS OF ASYMMETRICAL SUPPORTED ROTOR UNDER INFLUENCE OF HEELING ANGLE
- Journal of Mechanical Strength Vol. 42, Issue 2, Pages: 293-298(2020)
- 作者机构：
  
  1. 海军工程大学动力工程学院
  2. 海军工程大学兵器工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.02.006
  CLC：
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LI Mo, LIU YongBao, WANG Qiang. STUDY ON NONLINEAR DYNAMICS OF ASYMMETRICAL SUPPORTED ROTOR UNDER INFLUENCE OF HEELING ANGLE. [J]. 42(2):293-298(2020)
DOI：

LI Mo, LIU YongBao, WANG Qiang. STUDY ON NONLINEAR DYNAMICS OF ASYMMETRICAL SUPPORTED ROTOR UNDER INFLUENCE OF HEELING ANGLE. [J]. 42(2):293-298(2020) DOI： 10.16579/j.issn.1001.9669.2020.02.006.

摘要

以某舰用燃机低压转子系统的支撑结构为背景,考虑转子系统的横倾角,建立非对称滚动轴承支撑的转子动力学模型。采用变步长四阶龙格库塔法对系统的动力学方程组进行求解,用非线性理论对仿真结果进行分析。研究表明,低转速时,横倾角对系统的稳定性影响比较小;高转速时,横倾角主要对系统的1/2分频谐波产生影响,系统出现单一混沌岛或两个混沌岛的现象;当转子系统横向左倾和右倾角度相同时,横倾角对系统的非线性动力学产生相同的影响。研究结果可以为转子系统的设计、监测和故障诊断提供一定的理论依据。

Abstract

This paper takes the support structure of a low-pressure rotor system of a marine gas turbine as the background.Considering the heel angle of the rotor system,a dynamic model of the rotor supported by asymmetric rolling bearing is established. The variable-step fourth-order Runge-Kutta method was used to solve the system’ s dynamic equations,and the nonlinear theory were used to analyze the simulation results. The study shows that the heel angle has no effect on the stability of the system at low rotational speeds. At high rotational speed,the heel angle mainly affects the 1/2 harmonic of the system,and the system has a single chaotic island or two chaotic islands. When the left or right tilt angle of the rotor system is the same,the heel angle has the same effect on the nonlinear dynamics of the system. The research results can provide a theoretical basis for the design,monitoring and fault diagnosis of the rotor system.

关键词

横倾角非对称支撑滚动轴承非线性

Keywords

Heeling angleAsymmetrical supportRolling bearingNonlinear

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