Muszynska模型第一类参数对转子系统双稳态响应的影响  

The Influence of Muszynska Model's First Parameter on the Bistable Response of Rotor System

作　　者：杨坤 李宇 潘豹 何文博 YANG Kun;LI Yu;PAN Bao;HE Wen-bo(Key Laboratory on Civil Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学天津市民用航空器适航与维修重点实验室,天津300300

出　　处：《科学技术与工程》2018年第24期86-93,共8页Science Technology and Engineering

基　　金：中央高校基金(3122017088)资助

摘　　要：为了抑制转子系统双稳态响应,提高转子系统运行的稳定性,利用含挤压油膜阻尼器的转子实验台,以Muszynska密封模型为基础,在忽略转子系统陀螺效应的情况下,推导建立了密封流体激振力作用下含挤压油膜阻尼器的单盘偏置转子-密封系统非线性动力学方程;并对方程进行数值计算分析。重点研究了Muszynska第一类参数对双稳态响应的影响,得到了其对双稳态响应的影响规律。仿真计算得到:密封半径间隙在较大的范围内变化时,转子系统双稳态响应区间变化最大不超过0.5%;密封长度、密封半径及密封压降在较大范围内变化时,转子系统双稳态响应区间变化均超过了5%。该分析结果为实验结果做出了预估,也为转子系统减振及优化改善转子密封系统提供了一定的理论依据。In order to restrain the bistable response of the rotor system and improve the stability of the rotor system operation,rotary bench with squeeze film damper was used.Based on Musingka s seal model,without considering the gyro effect of the rotor system,the nonlinear dynamic equations of the biased rotor-seal system with squeezed film dampers under the action of sealed fluid excitation force were deduced.The equations were numerically calculated and analyzed.The influence of the first kind of design parameters related to the sealing system on the bistable response of the rotor system was analyzed emphatically and its influence on the bistable response was gotten.When the seal radius gap changes in a wide range,the bistable response range of the rotor system does not change by more than 0.5%.When the seal length,seal radius and seal pressure drop varied in a wide range,the bistable response range of the rotor system all varied by more than 5%.The analysis results provide an estimate of the experimental results,besides,the results of the analysis provide a theoretical basis for the vibration reduction of the rotor system and the optimization and improvement of the rotor seal system.

关 键 词：Muszynska模型 密封流体激振力 转子-密封系统 非线性动力学方程 第一类参数 双稳态 

分 类 号：TH133[机械工程—机械制造及自动化]