Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction
Abstract
:1. Introduction
2. DMF Structure and Parameters
3. Mechanical Analysis Model
3.1. Determination of Equivalent Force Position between the Secondary Flywheel and Spring Seat
3.2. Force Analysis
3.2.1. When Relative Rotational Angle Increases
3.2.2. When Relative Rotational Angle Decreases
4. Results and Discussion
4.1. Torque and Stiffness Characteristics of the DMF
4.2. Influence of Parameters on Torque and Stiffness Characteristics
4.2.1. Effect of Speed
4.2.2. Effect of Friction Coefficient
4.2.3. Effect of Spring Mass
4.2.4. Effect of Spring Seat Mass
4.3. Dynamic Torque Characteristic Test of DMF
5. Conclusions
- The transmission torque of the DMF has hysteresis characteristic and the torque and stiffness when the relative rotational angle increases are obviously greater than when the relative rotational angle decreases. The greater the relative rotational angle, the larger the torque and stiffness. Besides, the torque transmitted and the stiffness of the DMF also have specific symmetrical characteristics.
- Speed has little influence on the DMF torque when the relative rotational angle increases, but it has a great influence on the torque when the relative rotational angle decreases. A larger rotational speed makes the torque difference between the increases and decreases of the relative rotational angle greater, which results in more obvious hysteresis characteristics of transmission torque. Regardless of whether the relative rotational angle increases or decreases, the higher the speed, the greater the overall stiffness of the DMF and the lag angle will be. However, for a higher speed, the stiffness will change slower with a relative rotational angle.
- When the relative rotational angle increases, a larger friction coefficient will make the torque and stiffness greater. When the relative rotational angle decreases, the torque and stiffness will turn small with the addition of the friction coefficient. Therefore, the larger the friction coefficient, the greater the difference of the torque and stiffness when the relative rotational angle increases and decreases.
- The mass of the damping spring has an effect on the torque characteristics of DMF at small relative rotational angles. The greater the spring mass, the less torque is transmitted. However, the torque under different spring masses becomes close with the increase of rotational angle. The spring mass has a certain influence on the stiffness of the DMF. If the spring mass is increased, the overall stiffness will increase, and the changing process of stiffness will become more gentle with relative rotational angle.
- When the relative rotational angle increases, the addition of spring seat mass makes the transmitted torque greater. While when the relative rotational angle decreases, the transmitted torque will turn smaller with a higher value of the spring seat mass. Spring seat mass almost does not affect the stiffness of the DMF. Regardless of whether the rotational angle increases or decreases, the stiffness characteristic curves are basically the same.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Appendix A
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Zeng, L.; Xu, Y.; Huang, J.; Song, L. Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction. Symmetry 2021, 13, 1501. https://doi.org/10.3390/sym13081501
Zeng L, Xu Y, Huang J, Song L. Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction. Symmetry. 2021; 13(8):1501. https://doi.org/10.3390/sym13081501
Chicago/Turabian StyleZeng, Liping, Yukun Xu, Jie Huang, and Liquan Song. 2021. "Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction" Symmetry 13, no. 8: 1501. https://doi.org/10.3390/sym13081501
APA StyleZeng, L., Xu, Y., Huang, J., & Song, L. (2021). Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction. Symmetry, 13(8), 1501. https://doi.org/10.3390/sym13081501