燃料电池车声振测试及噪声源识别

对燃料电池车进行了振动噪声测试，采用分别运行法采集了在空气辅助系统和氢气辅助系统分别独立运行工况下的振动噪声信号。并通过对测试数据进行频谱分析等，确定了燃料电池车振动噪声的主要频率特性及主要振动噪声源为空气辅助系统和氢气辅助系统以及燃料电池冷却水泵等，同时针对主要振动噪声源提出了一些行之有效的改进方案，尤其是对风机及氢气辅助系统箱体的改进提出了见解性的改进意见。通过现代信号分析技术进行振动噪声源识别，确定主要的振动和噪声源，并对燃料电池车的减振降噪提出了可行性方案，是实施正确减振降噪措施的前提。

Noise and vibration tests for fuel cell vehicel and noise sources identification

Noise and vibration tests for fuel cell vehicle are made by respectively acquiring the vibration and noise signals when it is independently working with the air auxiliary system and the hydrogen auxiliary system. Through spectrum analysis it is identified that the air auxiliary system, the hydrogen auxiliary system and the cooling water pump are the main vibration and noise sources of the fuel cell vehicle. Some effective improvement programs, especially for the fan and the cabinet of hydrogen auxiliary system, and some feasible scheme to reduce noise and vibration of the vehicle are proposed. So it is useful to reduce noise and vibration for fuel cell vehicle by determining the noise and vibration sources, which are identified with the modern signal analysis technology.