CAJ | 학술논문

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。
이발동궤곡축계뉴전진동위연구대상，분석료뉴진감진기조니비삼수적변화대축계뉴전진폭방대계수적영향，병개전료축계변조니뉴진감진기적설계공작。계산결과표명：장배변조니뉴진감진기후，계통적자진빈솔화림계전속도상응유소승고；당변조니뉴진감진기재각림계전속하선취최가조니치시，축계자유단각계뉴전진폭균유명현강저，현저개선료발동궤적뉴전진동특성，험증료변조니뉴진감진기대축계뉴전진동억제적유효성。
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.