Transmission Path Analysis(TPA)is a commonly used acoustic and vibration testing and analysis method in the automotive industry.To identify the sources of interior noise in an electric vehicle and differentiate the influence of various noise sources on the interior noise,an operational transfer path analysis(OTPA)method was employed.Acoustic signal at the driver's ear was treated as the response.Road noise,wind noise,and motor noise were considered as excitations.A contribution analysis model for the interior noise of the electric vehicle was established and analyzed under 0-100km/h acceleration conditions.Specific analysis was conducted for the contributions at the peak sound pressure levels.The results indicated that the structural path from the left front tire contributes the most to the interior noise during acceleration,with a significantly higher input than other paths.Subsequent analyses can be based on these findings to optimize and improve the structure accordingly.
关键词
工况传递路径分析/贡献量分析/路噪/传递函数
Key words
Operational Transfer Path Analysis/Contribution Analysis/Road Noise/Transfer Function
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