Test and Analysis of Vibration and Noise Transmission Path of Electric Car Air Conditioning System
In order to control the noise in car under idling ac on in an electric car,the research on the vibration and noise trans-mission path of the air conditioning system is carried out.First,using Benchmark analysis,vehicle-subsystem performance de-composition,and order frequency analysis of rotating parts,the vibration and noise transmission paths of the air conditioning sys-tem key components are obtained,and the main factors that cause the noise in the car to be too loud are the stiffness of the cooling fan installation bracket and the vibration of the air conditioning pipeline;then,the installation bracket stiffness enhancement plan and the air conditioning pipeline vibration reduction measures are proposed;finally through the test data verification,after the improvement,the noise in the vehicle under the idling ac on is reduced from 46.2dB(A)to 44.5dB(A),which meets the tar-get value of 45.0dB(A).The above research methods can provide a reference for the analysis of the vibration and noise transmis-sion path of the air conditioning system of electric car,and can also provide a reference for the structural design of the air condi-tioning system of related vehicles.
Electric CarNoise in CarAir Conditioning SystemVibration and NoiseTransmission Path
NETL
NSTL
万方数据
维普
