本文概述了内燃叉车声辐射机理,讨论了噪声源的识别方法和叉车结构外表面按其辐射声功率的大小评定主次的方法。通过对带驾驶室CPCD5型内燃叉车的噪声与振动的频谱分析,提出了降低该机整机噪声的有效措施。同时指出,控制辐射源与控制激振源同样重要,两者都是机械噪声控制技术的关键。 This paper summarizes the sound radiation mechanism of the internal combustion forklift, discusses the identification method of the noise source and the evaluation of the primary and secondary methods of the external surface of the forklift truck according to the radiated sound power. Based on the spectrum analysis of the noise and vibration of CPCD5 forklift with cab, the effective measures to reduce the machine noise of the aircraft are put forward. Also pointed out that the control of radiation sources and control of excitation sources are equally important, both of which are the key to mechanical noise control technology.