基于波束形成技术的柴油机噪声源识别  

Noise Source Identification of Diesel Engine Based on Beamforming Technology

作　　者：宋玉平 杨卫平[2] 李贵[2] 

机构地区：[1]第一拖拉机股份有限公司,河南洛阳471003 [2]洛阳拖拉机研究所有限公司,河南洛阳471039

出　　处：《拖拉机与农用运输车》2013年第4期38-41,共4页Tractor & Farm Transporter

摘　　要：为了降低某型柴油机辐射噪声,运用基于波束形成技术的声学测量系统对某型号柴油机进行噪声源识别,得到柴油机表面主要噪声源及其频率特性。对柴油机前端面振动和声压信号的频谱进行分析,发现柴油机半阶次振动对柴油机的噪声影响较大,为进一步降低柴油机表面辐射噪声提供了参考依据。In order to reduce radiation noise of a diesel engine,the surface radiation noise sources and its spectrum characteristics are identified by acoustic measurement system based on beamforming technology.The results show that semiorder vibration of engine ignition has a great effect on engine noise by analyzing spectrum of the vibration signal on the engine front-side and sound pressure signal.It provides a reference for reducing surface radiation noise on engines.

关 键 词：噪声源识别 波束形成 柴油机 

分 类 号：TB533.1[理学—物理] TK421[理学—声学]