摘要
为最大化提高直升机功重比,越来越多的直升机设计中应用了超临界尾传动系统,这一系统会导致跨临界振动的产生。安装干摩擦阻尼器是一种常见的抑制直升机尾传动轴跨临界剧烈振动的方法。以某装有干摩擦阻尼器的尾传动轴为研究对象,建立控制方程,并分析系统在传动轴偏心激励下各类碰摩响应的边界特性。建立传动轴/阻尼器系统的非线性控制方程;依据扫频获得系统典型碰摩响应特征,使用解析法针对无碰摩响应求解碰摩发生边界,并对同频全周碰摩响应求解其稳定性条件的边界;通过Runge-Kutta法验证了所推导的响应边界,并探讨了响应边界与系统参数的影响关系。
In pursuit of the ideal power-to-weight ratio,supercritical transmission shaft systems are increasingly used in the design of helicopter structures,which leads to the generation of violent vibrations driving through its critical speed.To suppress the excessive transcritical vibration,dry friction dampers are usually employed.In this study,a supercritical transmission shaft system with a dry friction damper is investigated.The governing equations are established and the boundary characteristics of various rub-impact responses of the system under eccentric excitation of the transmission shaft are analyzed.Firstly,the nonlinear governing equations of the damper/shaft system are constructed.Secondly,typical response characteristics are determined using frequency sweep,and the boundaries of impact occurrence and stability conditions for the synchronous full annular rub are solved using analytical methods.Finally,the derived response boundaries are verified by the Runge-Kutta method,and the relationship between the response boundaries and the system parameters is further explored.
作者
金晟
宋立瑶
曹鹏
李坚
游有鹏
朱如鹏
王旦
JIN Sheng;SONG Li-yao;CAO Peng;LI Jian;YOU You-peng;ZHU Ru-peng;WANG Dan(National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;National Key Laboratory of Science and Technology on Helicopter Transmission,AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2024年第5期756-769,共14页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(52005253)
江苏省自然科学基金资助项目(BK20200426)
江苏省精密与微细制造技术重点实验室自主科研项目。
关键词
超临界尾传动轴
干摩擦阻尼器
碰摩
响应特性
稳定性分析
supercritical transmission shaft
dry friction damper
rub-impact
response characteristics
stability analysis
