Fundamental study of subharmonic vibration of order 1/2 in automatic transmissions for cars
Fundamental study of subharmonic vibration of order 1/2 in automatic transmissions for cars
复制标题
汽车自动变速器1/2次谐波振动的基础研究
DOI：
10.1088/1742-6596/744/1/012206
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Kenichiro Matsuzaki et al.
中科院分区：
文献类型：
--
作者：
Takahiro Ryu;Takashi Nakae;Kenichiro Matsuzaki et al.
变矩器是将扭矩从发动机传递到汽车自动变速器中的齿轮系的元件。变矩器中锁止离合器的减振弹簧用于有效吸收发动机燃烧引起的扭转振动。具有低刚度的阻尼器减少了旋转速度的波动，但是由于空间限制而难以使用。为了解决这个问题，阻尼器设计使用分段线性弹簧与三个刚度级。然而，阻尼器引起称为1/2阶次谐波振动的非线性振动。在次谐波振动中，频率是来自发动机的振动的频率的一半。为了阐明亚谐振动的机理，在本研究中，使用具有两个刚度级的单自由度系统的基本实验装置进行实验。在实验中，还进行了通过改变实验条件来减少次谐波振动的对策。实验结果进行了评估，通过数值分析，使用射击方法。实验和分析结果被认为是在密切的协议。
A torque converter is an element that transfers torque from the engine to the gear train in the automatic transmission of an automobile. The damper spring of the lock-up clutch in the torque converter is used to effectively absorb the torsional vibration caused by engine combustion. A damper with low stiffness reduces fluctuations in rotational speed but is difficult to use because of space limitations. In order to address this problem, the damper is designed using a piecewise-linear spring with three stiffness stages. However, the damper causes a nonlinear vibration referred to as a subharmonic vibration of order 1/2. In the subharmonic vibration, the frequency is half that of the vibrations from the engine. In order to clarify the mechanism of the subharmonic vibration, in the present study, experiments are conducted using the fundamental experimental apparatus of a single-degree-of-freedom system with two stiffness stages. In the experiments, countermeasures to reduce the subharmonic vibration by varying the conditions of the experiments are also performed. The results of the experiments are evaluated through numerical analysis using the shooting method. The experimental and analytical results were found to be in close agreement.