The Study and Optimization of Gearbox Whine Noise in the Cab of Commercial Vehicle

An experimental optimization study was carried out to solve the problem of whine noise of a newlydeveloped commercial truck. Firstly, with the help of the vehicle road test, the minimum difference between the gear meshing one third octave order noise and narrowband order noise whether greater than 8 dB(A) can be as the judgment basis for the absence of whine in the cab. Secondly, with the help of sourcing-path-receiver analysis,transmission gear meshing excitation is mainly transmitted through the structural path; Finally, considering the feasibility and cost,by optimizing the accuracy of the 8^th gears of the transmission and the structure of the connecting end of the shifting lock cab, the problem of whine noise in the cab of the truck was effectively solved.