Dynamic Characteristics Analysis of Circumferential Rod Fastening Rotor-Bearing System Considering Contact Stiffness

Ying CUI; Han ZHANG; Yuxi HUANG

doi:10.12096/j.2096-4528.pgt.21052

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Dynamic Characteristics Analysis of Circumferential Rod Fastening Rotor-Bearing System Considering Contact Stiffness

Intelligent Turbine Power Generation Technology | 更新时间：2025-07-04

- Dynamic Characteristics Analysis of Circumferential Rod Fastening Rotor-Bearing System Considering Contact Stiffness
- Power Generation Technology Vol. 42, Issue 4, Pages: 447-453(2021)
- 作者机构：
  
  大连海事大学船舶与海洋工程学院, 辽宁省大连市 116026
- 作者简介：
- 基金信息：
  
  Guiding Plan of Natural Science Foundation of Liaoning Province(201602070)
- DOI：10.12096/j.2096-4528.pgt.21052
  CLC： TK05
- Received：07 May 2021，
  
  Published：31 August 2021
- 稿件说明：
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Ying CUI, Han ZHANG, Yuxi HUANG. Dynamic Characteristics Analysis of Circumferential Rod Fastening Rotor-Bearing System Considering Contact Stiffness[J]. Power Generation Technology, 2021, 42(4): 447-453.
DOI：

Ying CUI, Han ZHANG, Yuxi HUANG. Dynamic Characteristics Analysis of Circumferential Rod Fastening Rotor-Bearing System Considering Contact Stiffness[J]. Power Generation Technology, 2021, 42(4): 447-453. DOI： 10.12096/j.2096-4528.pgt.21052.

摘要

为了探究周向拉杆转子-轴承系统的动力学特性，利用自相关函数法建立三维高斯随机粗糙表面数值模型，并通过Ansys APDL生成粗糙表面几何模型。利用Abaqus软件对粗糙表面进行有限元接触仿真计算，得到不同预紧力下单位面积粗糙表面的接触刚度，进而建立了考虑接触刚度的某型燃气轮机周向拉杆转子-轴承系统有限元模型。计算得到了不同预紧力、轴承装配间隙下该系统的动力学特性，结果表明：转子系统的临界转速随预紧力的增大而呈非线性增大趋势；轴承处转子过临界转速时，不平衡响应振幅随预紧力和轴承装配间隙增大而增大。

Abstract

In order to explore the dynamic characteristics of the circumferential rod fastening rotor-bearing system

a numerical model of three-dimensional Gaussian random rough surface was established by using the method of autocorrelation function. Moreover

the geometric model of rough surface was generated by Ansys APDL. Abaqus software was used to simulate the contact of rough surface

and the contact stiffness of rough surface under different preloads was obtained. The finite element model of the circumferential rod fastening rotor-bearing system of a certain type of gas turbine considering the contact stiffness was also established. The dynamic characteristics of the system with different preloads and clearances of bearing assembly were calculated. It is shown that critical speed of rotor-bearing system increases nonlinearly with the increase of preload

and the amplitude of unbalance response increases with the increase of preload and clearance of bearing assembly as the rotor has passed the critical speed.

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references

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