发动机变阻尼扭振减振器的轴系扭振抑制分析  

Torsional Vibration Reduction Analysis of Variable Damping Torsional Vibration Damper for Engine Crankshaft

作　　者：舒歌群[1] 王斌[1] 梁兴雨[1] 

机构地区：[1]天津大学机械工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2015年第1期19-24,共6页Journal of Tianjin University：Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA111702)

摘　　要：以发动机曲轴系扭转振动为研究对象,分析了扭振减振器阻尼比参数的变化对轴系扭转振幅放大系数的影响,并开展了轴系变阻尼扭振减振器的设计工作.计算结果表明:装配变阻尼扭振减振器后,系统的自振频率和临界转速都相应有所升高;当变阻尼扭振减振器在各临界转速下选取最佳阻尼值时,轴系自由端各阶扭转振幅均有明显降低,显著改善了发动机的扭转振动特性,验证了变阻尼扭振减振器对轴系扭转振动抑制的有效性.Taking the crankshaft torsional vibration of engines as research object,we analyzed the effect of variation of damping ratio parameters of torsional vibration damper on the amplitude amplification coefficient of crankshaft torsional vibration. The design of variable damping torsional vibration damper was also carried out in this paper. The results show that after the variable damping torsional vibration damper is installed,both the natural frequency and critical rotation speed of the system increase. When the optimal damping value is selected for every critical rotation speed of the variable damping torsional vibration damper,it will lead to an obvious reduction in torsional amplitude of different orders at crankshaft system free end,which improves the torsional vibration features of the engine,and indicates that it is effective to depress the torsional vibration by means of using variable damping torsional vibration damper.

关 键 词：变阻尼 扭振减振器 轴系扭振 强迫振动 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]