船体横荡运动对转子-浮筏气囊耦合系统非线性动力学特性的影响  

Nonlinear Dynamics Effects of Ship Rotor-Floating Raft Airbag System under Sway Motion

作　　者：王军伟 李明[1] 谢旋 杜晓蕾 WANG Junwei;LI Ming;XIE Xuan;DU Xiaolei(School of Science,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China)

机构地区：[1]西安科技大学理学院,陕西西安710054

出　　处：《润滑与密封》2022年第12期83-90,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(11972282)。

摘　　要：为研究横荡作用下船用转子-浮筏气囊耦合系统的非线性动力学特性,基于短轴承理论建立系统的数学模型,并用数值方法分析系统的动力学行为,探究转子转速、横荡幅值和频率变化对系统非线性动力学特性的影响。结果表明:与无横荡作用时相比,系统的动力学特性更为复杂;在转子转速较低时,系统在船体横荡作用下处于拟周期运动状态,随着转子转速的增加,系统出现分岔现象然后又合为一支直至混沌;随着横荡幅值的增大,转子的振动幅值也会随之增大,然而频率比的增加会使转子的振幅变小。In order to study the dynamic characteristics of the marine rotor-floating raft airbag system under the sway motion,the mathematical model of the system was established based on the short-bearing theory,and the dynamic behaviors were analyzed on numerical method.The effects of rotor speed,sway amplitude and frequency changes on the nonlinear dynamic characteristics of the system were investigated.The results show that comparing with the system without sway motion,the characteristic of system with is sway motion more complicated.The system is in quasi-periodic motion at the low speed of rotor under sway motion,and as the rotor speed increases,the system bifurcates then merges into a branch until chaos.With the increase of the amplitude of swaying,the vibration amplitude of the rotor increases.However,the increase of the frequency ratio will make the amplitude of the rotor smaller.

关 键 词：非线性动力学 横荡运动 转子-浮筏气囊系统 分岔 

分 类 号：TH133.3[机械工程—机械制造及自动化]