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CSME 2023/12
Volume 44 No.6
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533-534
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Non-Linear Dynamic Model and Analysis of Two-Speed Helical Gear Transmission Equipped with Two-Way Synchronizer
Linjun Tonga, AL-TAYARI ABDULHAMEED M.Y.b, Siyu Chenc and Zhou Sunb
aDepartment of Automotive Engineering, Foshan, Polytechnic, Foshan,Guangdong 528137, China.
bDepartment of Mechanical and Electrical Engineering, Ccntral South University, Changsha, Hunan 410083, China.
cDepartment of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan 410083, China.
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Abstract:
In response to environmental pressure and market demand, multi-stage transmission is a feasible transmission mode for Pure Electric Vehicles (PEVs). Synchronizers can effectively reduce the vibration im-pact of PEV during frequent gear shifting, but the lack of a theoretical model limits the further study of its influence mechanism. Hence, a 20-degree-of-freedom (DOF) non-linear dynamic model of a two-speed heli-cal gear (TSHG) transmission equipped with a two-way synchronizer is established considering the stiff-ness and friction torque of bidirectional synchronizer, time-varying meshing stiffness (TVMS), meshing damping, static transmission error (STE), gear back-lash, torsional damping, and stiffness. The comparison with the experiment indicates the effectiveness of the established dynamic model. The results of the dynam-ics characteristics show that compared with the (low-speed) first gear transmission, the (high-speed) second gear transmission shows complex nonlinear dynamic characteristics. The increase in support stiffness, the decrease in TVMS ratio and STE amplitude contribute to the weakening and disappearance of the chaotic motion in the system. These results provide a helpful reference for non-linear behavior restraining and vibration and noise reduction of the two-speed trans-mission (TST) for PEVs.
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Keywords: Pure Electric Vehicle, Two Speed Transmission, Two-way synchronizer, Non-linear dynamic model, Vibration response analysis.
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©
2023
CSME , ISSN 0257-9731
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