摘要
主要研究了冲击激励下含限位器的气囊-旋转机械系统的动力学特性。首先,考虑了轴承的非线性油膜力和转子的不平衡力等因素,建立了在冲击激励下气囊-旋转机械系统的非线性动力学模型;然后,采用数值模拟的方法分析了冲击激励下,限位器对气囊-旋转机械系统动力学特性的影响,讨论了在限位器不同刚度比、安装间隙、阻尼比等参数下气囊-旋转机械系统的动力学响应。结果表明:限位器的刚度和安装间隙对冲击激励下系统的最大相对位移和绝对加速度有较大影响,而阻尼对其影响会随着刚度比的增大而减小。
Dynamic characteristics of an airbag-marine rotating machinery system with displacement restrictor under shock excitation were studied.Firstly,the nonlinear dynamic model of the airbag-rotating machinery system under shock excitation was established considering nonlinear oil film force of bearings and unbalance force of rotor.Then,the numerical simulation method was used to analyze effects of displacement restrictor on dynamic characteristics of the system under shock excitation,and discuss dynamic responses of the system under variation of displacement restrictor’s parameters including stiffness ratio,installation clearance and damping ratio.The results showed that displacement restrictor’s stiffness ratio and installation clearance have larger effects on the system’s maximum relative displacement and absolute acceleration under shock excitation,while effects of damping ratio decrease with increase in stiffness ratio.
作者
李鹏超
李明
LI Pengchao;LI Ming(School of Sciences,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第5期183-187,193,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(11972282)
陕西省自然科学基础研究计划重点项目(2018JZ1001)。
关键词
气囊-旋转机械系统
限位器
冲击激励
非线性动力学
airbag-rotating machinery system
displacement restrictor
shock excitation
nonlinear dynamics
