Simulation Analysis of Abnormal Noise in Spline Engagement of High Speed E-Drive Rotor Shaft
In order to eliminate transmission system abnormal noise during vehicle operation,a simulation analysis is conducted on the abnormal frequency doubling of the rotor shaft frequency appearing in a high-speed electric drive.To clarify the impact mechanism,a nonlinear dynamic simulation model of the electric drive transmission system including rotational and dynamic degrees of freedom is established in Adams,focusing on the effects of motor excitation source,rotor shaft unbalance,spline machining accuracy and matching accuracy,and transmission system on frequency doubling excitation.Adams multi-step integration method is used for numerical solution and sensitivity analysis.The results show that the frequency doubling excitation is sensitive to the torque fluctuation of electric drive and the machining and matching accuracy of spline,which is in good agreement with the sample disassembly analysis and test results.The control of torque fluctuation and spline machining accuracy and matching accuracy is helpful to improve the abnormal issues of frequency doubling excitation.
Electric drive splineAbnormal orderMachining errorTime varying stiffnessFrequency doubling excitation
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