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| Shock characteristics and dynamic response analysis of a DMF considering clearance and hysteretic variation of torque |
| ZENG Liping1,2, HUANG Jie1,2, SONG Liquan3, XU Yukun1,2 |
1.Key Laboratory of Conveyance and Equipment of the Ministry of Education, East China Jiaotong University, Nanchang 330013, China;
2.School of Mechatronics & Vehicle Engineering, East China Jiaotong University, Nanchang 330013, China;
3.College of Mechanical Engineering, Chongqing University, Chongqing 400044, China |
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Abstract Considering the clearance between the spring seats and the secondary flywheel in a circumferential short spring dual mass flywheel (DMF), the contact stiffness between the spring seats and the secondary flywheel was deduced based on the Winkler elastic basic model, and the mathematical model of the torque hysteresis variation of the DMF was described. To analysis the shock characteristics and dynamic response of the DMF during vehicle starting and normal driving, the nonlinear dynamic analysis model of a vehicle transmission system with the DMF was established. The analysis results show that there is a shock between the spring seats and secondary flywheel for the clearance under starting period. And the torque produced by contact and the transmitted torque of the damping spring fluctuates greatly. Increasing the friction torque is helpful to alleviate the shock caused by the clearance of DMF. The vibration amplitude of the secondary flywheel is significantly lower than that of the primary flywheel after damping by the DMF during driving. Besides, the torque transmitted by DMF has a jump change partially and has a certain lag.
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Received: 08 October 2021
Published: 15 December 2022
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