垂荡激励下船用旋转机械-气囊隔振系统的非线性振动机理  

Mechanism of nonlinear vibration of the marine rotating machinery with air-bag system under heaving motion

作　　者：杜晓蕾 李明[1] DU Xiao-lei;LI Ming(Department of Mechanics,Xi´an University of Science and Technology,Xi´an 710054,China)

机构地区：[1]西安科技大学力学系,陕西西安710054

出　　处：《振动工程学报》2021年第4期782-789,共8页Journal of Vibration Engineering

摘　　要：舰船在航行时产生的牵连运动会对船用机械系统的振动产生重要的影响,因此研究垂荡作用下的船用旋转机械的动力学特性及其振动控制具有重要的工程意义。讨论了垂荡激励下船用旋转机械⁃气囊隔振系统的非线性振动机理与振动特征。建立了具有气囊隔振系统的船用旋转机械的数学模型,采用多尺度法分析了船体的垂荡运动与转子运动之间的关系,揭示其振动机理。采用数值分析方法研究了垂荡激励下船用旋转机械⁃气囊隔振系统的动力学特性,并与近似解进行了比较,验证了理论结果的有效性。The implicated motion of a ship during its voyage will have an important impact on the vibration of the marine mechani⁃cal system.Therefore,it is a significant practical work in engineering to study the dynamic characteristics and vibration control of the marine rotating machinery under the heave.This paper mainly discusses the nonlinear vibration mechanism and characteristics of the marine rotating machinery-air bag vibration isolation system under heave excitation.The mathematical model of the marine rotating machinery with air bag vibration isolation system is established,and the relationship between heave motion and rotor mo⁃tion is analyzed by multi-scale method to reveal its vibration mechanism.The dynamic characteristics of the marine rotating machin⁃ery-air bag vibration isolation system under heave excitation are studied by numerical method,and compared with the approximate solution,the effectiveness of the theoretical results is verified.

关 键 词：非线性振动 舰船垂荡运动 船用旋转机械 隔振系统 多尺度法 

分 类 号：O322[理学—一般力学与力学基础] O328[理学—力学]