含内阻的拉杆组合转子双稳态振动特性  

Bistable Vibration Characteristics of Rod Fastening Rotor with Internal Damping

作　　者：王龙凯 王艾伦 金淼[2] 尹伊君[1,2] WANG Longkai;WANG Ailun;JIN Miao;YIN Yijun(Light Alloy Research Institute,Central South University,Changsha,410083;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha,410083)

机构地区：[1]中南大学轻合金研究院,长沙410083 [2]中南大学高性能复杂制造国家重点实验室,长沙410083

出　　处：《中国机械工程》2021年第5期512-522,564,共12页China Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划)(2013CB035706);国家自然科学基金(51175517);中央高校基本科研业务费专项资金(2019zzts256)。

摘　　要：为揭示含内阻组合转子复杂的双稳态振动特性,基于拉格朗日方程推导了含轮盘接触、非线性油膜力及内阻的组合转子非线性运动控制方程。采用升速和降速相结合的方法研究了组合转子跨2阶临界转速的非线性动力学行为及内阻机理。研究结果表明:组合转子双稳态振动特征显著,内阻导致出现双稳态现象的转速区间明显向低转速方向移动,在分析组合转子振动特性时应考虑内阻效应,以有效预测双稳态现象的出现。To reveal the complex bistable vibration characteristics for combined rotor with internal damping,a nonlinear governing equation of motion for rod fastening rotor containing disk contact,nonlinear oil film force,and internal damping was derived based on Lagrange equation.Nonlinear dynamic behavior and internal damping mechanism of the combined rotor were studied by the method of combining speed-up and speed-down,and the investigated operating rotation speed was over the 2nd critical rotation speed.The results show that the combined rotor has significant bistable vibration characteristics,which is the very undesirable phenomenon.The internal damping causes rotation speed range where the bistable response phenomena occur to move significantly to the lower rotation speed direction.As a result,internal damping effect should be considered when analyzing the vibration characteristics of the combined rotor,to effectively predict the occurrence of bistable phenomena.

关 键 词：拉杆转子 振动特性 内阻 双稳态 失稳 

分 类 号：TH113.1[机械工程—机械设计及理论] O322[理学—一般力学与力学基础]