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Open AccessArticle

Analysis of Powertrain Loading Dynamic Characteristics and the Effects on Fatigue Damage

1
School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
2
Beijing Institute of Space Launch Technology, Beijing 100076, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2017, 7(10), 1027; https://doi.org/10.3390/app7101027
Received: 5 September 2017 / Revised: 27 September 2017 / Accepted: 28 September 2017 / Published: 6 October 2017
(This article belongs to the Section Mechanical Engineering)
The objective of this study is to investigate the effects of key factors on the powertrain loading dynamic characteristics and fatigue damage. First, the engine and the transmission output shaft torque of a multi-axle vehicle powertrain system were measured by proving grounds (PG) testing and analyzed with a conclusion that the powertrain loading changes were mainly related to three key factors: the mean engine torque, the harmonic engine torque, and the vibration properties of the system. Subsequently, a dynamic model considering the three factors was built and validated by the test data. Finally, fatigue damage of shaft parts and gear parts were calculated to investigate the influence degrees of the three factors. The results show that, the harmonic engine torque and the vibration properties of the powertrain system have a great influence on the fatigue damage of shaft parts, and the mean engine torque is the main factor causing the fatigue damage of gear parts. View Full-Text
Keywords: powertrain; loading spectrum; torque measurement; dynamic characteristics; fatigue damage; harmonic engine torque; vibration property powertrain; loading spectrum; torque measurement; dynamic characteristics; fatigue damage; harmonic engine torque; vibration property
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Bai, J.; Wu, X.; Gao, F.; Li, H. Analysis of Powertrain Loading Dynamic Characteristics and the Effects on Fatigue Damage. Appl. Sci. 2017, 7, 1027.

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