含双重三要素型吸振器的碰摩转子的振动特性分析  

Analysis of the Vibration Characteristics of A Rub-impact Rotor with A Double Three-element Vibration Absorber

作　　者：邢欢 刘子良 李明昊 孙龙飞 贾磊 XING Huan;LIU Ziliang;LI Minghao;SUN Longfei;JIA Lei(School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学机械工程学院,辽宁沈阳110159

出　　处：《内燃机》2024年第2期48-53,共6页Internal Combustion Engines

基　　金：辽宁省教育厅面上项目(LJKMZ20220602)。

摘　　要：对碰摩故障下安装有抑制共振的最优双重三要素型转子吸振器的转子的振动特性进行了研究。利用转子动力学方法建立了吸振器-转子的动力学方程,通过Newmark-Newton方法对方程进行了求解,借助分岔图分析了吸振器参数、碰摩参数对转子振动特性的影响。结果显示:刚度较小的单体吸振器1的ka1为最优值的1.66~2倍时,吸振器-转子呈现周期二运动,其他参数变动时转子基本处于周期N运动或混沌运动;刚度较大的单体吸振器2的ka2为最优值的1.36~2倍时,吸振器-转子呈周期二运动,其他参数变动时转子基本处于周期N或混动运动。碰摩刚度的变化,会使吸振器-转子的运动由周期四运动转为周期N运动或混沌运动;碰摩摩擦系数除在初始值的0.8~1.18倍、1.48~1.6倍范围内使吸振器-转子呈周期四运动外,其他变动数值时系统呈周期二运动。The vibration characteristics of a rotor with an optimal double three-element rotor absorber with resonance suppression under rub-impact were studied.The dynamic equation of the absorber-rotor system is established by using the rotor dynamics method,and the equation is solved by Newmark-Newton method.The influence of the absorber parameters and friction parameters on the rotor vibra-tion characteristics is analyzed by using the bifurcated diagram.The results show that when the ka1 of the single absorber 1 with small stiffness is 1.66~2 times of the optimal value,the absorber rotor presents periodic two motion,and the rotor is basically in periodic N motion or chaotic motion when other parameters change.When the ka2 of the single absorber 2 with large stiffness is 1.36~2 times of the optimal value,the absorber and rotor show periodic two motion,and the rotor is basically in periodic N or mixed motion when other parameters change.The change of friction stiffness will make the motion of the absorber rotor change from periodic four-motion to peri-odic N-motion or chaotic motion.When the friction coefficient of friction is 0.8~1.18 times and 1.48~1.6 times of the initial value,the system moves in period two motion except that the vibration absorption-rotor moves in period four motion.

关 键 词：转子吸振器 碰摩 转子 分岔 周期N运动 混沌运动 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]