Due to the high-power diesel engine,the Off-Road pickup truck has the problem of steering wheel vibration under idling condition,which seriously affects the NVH performance of the whole vehicle.To address this problem,this paper calculates the acceleration response at the steering wheel based on the finite element model of the whole vehicle,tak-ing the acceleration signal at the suspension bracket of the powertrain collected in the test as the input,and verifies the va-lidity of the model through the test results.Based on the validated model,the vibration transmission paths at the vehicle level and system level were analyzed by the transmission path analysis(TPA)method,and the transmission paths with the largest contribution were obtained by level-by-level decomposition.An optimization scheme to improve the steering wheel vibration by adjusting the stiffness of the instrument beam bracket and increasing the additional mass is proposed,and the optimization effect is verified by real vehicle tests.The analysis and improvement method of idling steering wheel vibration can provide a reference for the design and optimization of this type of vehicles.
steering wheel shakingfinite element analysisTPA analysis
NETL
NSTL
万方数据
