Complex Mode Analysis and Simulation Research of Automotive Driveline Based on Bending-torsional-axial Coupled Vibration Hybrid Model#br#

Abstract

Abstract: The characteristics of torsional-bending-axial coupled vibration hybrid model for automotive driveline are introduced based on the combination of system dynamics and structural dynamics and the modelling methods of hybrid model for automotive driveline are also discussed from three aspects which are structural dynamic modelling of shaft, system dynamic modelling of helical gear pair, bearing and attaching mass(inertia), connections among components by coordinate transformation. Complex mode analysis of driveline is analyzed and it is found that the main vibration mode of first four order modal calculated by hybrid model are torsional vibration and they are similar to the first four order modal calculated by system dynamic branched torsional vibration model, the main vibration modes are two or three forms of coupled vibration after the fifth order modal. It is discovered that the shudder degree of hybrid model is slightly enhanced and the characteristic frequency is almost the same between hybrid model and branched torsional model from the simulation research of launch shudder. It is also concluded that bending and axial vibrations have little effect on launch shudder phenomenon.

Key words: automotive driveline, bending-torsional-axial coupled vibration, complex mode analysis, hybrid model, launch shudde

LUAN Wenbo, WU Guangqiang. Complex Mode Analysis and Simulation Research of Automotive Driveline Based on Bending-torsional-axial Coupled Vibration Hybrid Model#br#[J]. Journal of Mechanical Engineering, 2015, 51(22): 73-81.

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