Optimisation of Vehicle Structure Road Noise Problems using Finite Element Modelling Methods
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Abstract
During the daily driving of a vehicle, noise is often generated by road excitation and thus interferes with the driver's driving. In order to effectively improve the vehicle structure road noise problem, a new method for road noise optimisation is proposed. Firstly, the finite element method is used to construct a complete vehicle model and set the relevant structural parameters of the vehicle, then the transfer path method is used to design a vehicle structure road noise optimisation scheme and the above model is simulated and tested. The experimental results show that the structural road noise at 55 Hz and 110 Hz has a peak value of road noise and the constructed finite element model can accurately predict the changes of the sound pressure response and the vibration value of the body attachment point. By using the transfer path to optimise the road noise frequencies at 55 Hz and 110 Hz, the peak noise level at 55 Hz was reduced from 45.21 dB to 41.63 dB in the driver's left ear and the decibel level in the right ear was also reduced. At the same time, the peak noise level in the driver's left ear at 110 Hz was reduced from 42.55 dB to 34.25 dB and the right ear decibel was also reduced. In summary, the structural road noise optimisation solution designed in this study has a good performance effect and can be used in practical road noise optimisation problems.
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