为了研究电动汽车噪声特性及机理,在分析电动汽车噪声源的基础上进行了整车声振特性台架试验,运用频谱分析、阶次分析和偏相干分析相结合的方法对试验数据进行处理,分析了辅助系统的噪声频域特性,对比了正驱工况和倒拖工况下动力总成振动噪声特性,明确了动力总成噪声对车外噪声的贡献。研究结果为电动汽车整车振动噪声特性优化改善提供了试验支持。
Abstract
The main noise sources of electric vehicle were analyzed, and then a vibration and noise experiment was conducted in order to investigate the generating mechanism and characteristics of electric vehicle noise. Spectral analysis, order analysis and partial coherence analysis are used to not only analyze the frequency characteristics of auxiliary system and compare vibration and noise characteristics of the electric powertrain between the coasting down condition and driving up condition respectively, but also clarify the contributions of powertrain noise on the vehicle. The research provides experimental support for the NVH optimation of the electric powertrain.
Key words
Electric vehicle /
Electric Powertrain /
Vibration and Noise /
Order Analysis /
Partial Coherence Analysis
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参考文献
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脚注
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