TY - GEN
T1 - Torsional Vibration Modelling and Shaft Strength Analysis of Electromechanical Transmission Systems
AU - Jiao, Jiaxin
AU - Gao, Pu
AU - Liu, Hui
AU - Yan, Qi
AU - Yan, Keyu
AU - Yang, Dianzhao
N1 - Publisher Copyright:
© The Chinese Mechanical Engineering Society 2026.
PY - 2026
Y1 - 2026
N2 - Hybrid electric vehicle (HEV) technology represents a critical form of modern new energy automotive systems, with the hybrid powertrain serving as its core functional component. This study investigates vibration characteristics and shaft strength in heavy-duty HEV transmission systems based on multi-body dynamics theory. A compound torsional vibration model integrating the front transmission gear train, reduction gear set, and variable-speed gear set was constructed to resolve the system's natural frequency distribution and modal shapes. Critical parameters influencing low-order torsional vibrations were identified through contribution degree analysis, enabling optimization of critical resonance frequency bands and effectively avoiding system resonance. Dynamic load variations at critical nodes under engine-motor hybrid excitation were analyzed, with torsional vibration stresses in sensitivity-prone shaft segments calculated across full operating conditions under high-power inputs. Verification through comparative analysis between torque fluctuations at critical nodes and allowable stress thresholds confirmed that the strength of all key shaft segments meets operational requirements.
AB - Hybrid electric vehicle (HEV) technology represents a critical form of modern new energy automotive systems, with the hybrid powertrain serving as its core functional component. This study investigates vibration characteristics and shaft strength in heavy-duty HEV transmission systems based on multi-body dynamics theory. A compound torsional vibration model integrating the front transmission gear train, reduction gear set, and variable-speed gear set was constructed to resolve the system's natural frequency distribution and modal shapes. Critical parameters influencing low-order torsional vibrations were identified through contribution degree analysis, enabling optimization of critical resonance frequency bands and effectively avoiding system resonance. Dynamic load variations at critical nodes under engine-motor hybrid excitation were analyzed, with torsional vibration stresses in sensitivity-prone shaft segments calculated across full operating conditions under high-power inputs. Verification through comparative analysis between torque fluctuations at critical nodes and allowable stress thresholds confirmed that the strength of all key shaft segments meets operational requirements.
KW - Hybrid power
KW - Multi-gear transmission system
KW - Reliability verification
KW - Torsional vibration
UR - https://www.scopus.com/pages/publications/105041225398
U2 - 10.1007/978-981-95-7342-4_123
DO - 10.1007/978-981-95-7342-4_123
M3 - Conference contribution
AN - SCOPUS:105041225398
SN - 9789819573417
T3 - Mechanisms and Machine Science
SP - 1753
EP - 1768
BT - Advances in Mechanical Design - Proceedings of the 2025 International Conference on Mechanical Design ICMD 2025
A2 - Tan, Jianrong
A2 - Liu, Zhenyu
A2 - Hu, Weifei
PB - Springer Science and Business Media B.V.
T2 - International Conference on Mechanical Design, ICMD 2025
Y2 - 9 May 2025 through 11 May 2025
ER -