Abstract
This study describes the typical NVH phenomena in four-wheel-drive SUV caused by vibration behavior of the propeller shaft and suggests the effective engineering solution to the NVH refinement. The equations of motion for the multibody drivetrain consisting of interconnected rigid and flexible bodies are derived by employing Legrange's equations and are taken computational evaluation with the Wehage's algorithm. Effects of engine excitation to the various mount components are investigated by the calculated transfer function and approved by vehicle test result. The influencing factors to the resonance vibration in drivetrain are evaluated with the variance of the design parameters and the materials of the propeller shaft by comparing numerical results. The effects of rubber coupling and tube vibration absorber on the bending vibrations are evaluated by undertaking both simulation and vehicle test.