摘要
基于机械振动学和弹流润滑理论,将弹流油膜简化为弹簧阻尼,建立了线接触摩擦副的摩擦学、动力学耦合模型,用数值方法求解了摩擦副的振动响应,通过简谐激励下系统的阻尼环求得摩擦副的刚度和阻尼,分析了载荷、速度对摩擦副动力学特性的影响。结果表明:弹流油膜具有显著的刚度、阻尼特征;弹流状态下,当速度一定时,摩擦副的刚度、阻尼随载荷增加而几乎线性地增加;而当载荷一定时,摩擦副的刚度、阻尼随速度的增加而指数般减小。
Based on the mechanical vibration and EHL theory,the EHL oil film was simplified as the spring damping.The tribological and dynamic coupling model for linear contact friction pair was constructed.The vibration response of friction pair was solved by using the numerical method.The stiffness and damping of the friction pair were calculated by the damping ring of the system under harmonic excitation.The effects of the load and velocity on the dynamic characteristics of friction pairs were analyzed.The results show that the EHL film has remarkable stiffness and damping characteristics.In the EHL state,when the velocity is constant,the stiffness and damping of friction pair increase linearly with the increasing of load.When the load is constant,the stiffness and damping of friction pair decrease exponentially with the increasing of velocity.
作者
夏伯乾
高磊
张绍林
郭红
XIA Boqian;GAO Lei;ZHANG Shaolin;GUO Hong(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《机械科学与技术》
CSCD
北大核心
2021年第4期493-499,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金资助项目(51575498)。
关键词
线接触
弹流摩擦副
刚度
阻尼
line contact
EHL friction pair
stiffness
damping
