An investigation on the influence of the supporting structure on the dynamics of the rotor system

被引：71

作者：

Cavalca, KL ^{[1
]}

Cavalcante, F ^{[1
]}

Okabe, EP ^{[1
]}

机构：

[1] Univ Estadual Campinas, FEM, Dept Mech Design, BR-13083970 Campinas, SP, Brazil

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2005年 / 19卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

flexible structures; hydrodynamic bearings; rotors; modal parameters;

D O I：

10.1016/j.ymssp.2004.04.001

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This work presents a methodology to analyse the influence of the foundation or supporting structure on the rotor-bearings system. The mathematical procedure applies a modal approach using modal parameters of generalised mass, damping ratio and natural frequencies. The Finite Elements Method is used to model the rotor. The linear model of the foundation is obtained by FEM and a modal approach is applied to reduce the degree of freedom order of the foundation model. The modal parameters of the foundation are estimated using the frequency response functions and their respective Fourier Transforms, obtained experimentally. An analysis of the frequency response of the complete system is accomplished considering physical co-ordinates for the rotor-bearings system and principal co-ordinates for the foundation. Convergence of the presented methodology is verified and the effect of the flexible foundation on the complete system response is analysed. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：157 / 174

页数：18

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