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该文对国产ＤＧ３型割灌机的振动频谱以及各振源点与手柄间的振动传递函数进行了实验分析．结果表明，在工作转速（６０００ｒ／ｍｉｎ）下的振动加速度几乎都集中在６０～２００Ｈｚ范围内，并且７６Ｈｚ，１００Ｈｚ和１５２Ｈｚ是３个主要支配性峰值，它们是减振的主要对象频率；轴承Ｂ１，Ｂ２，Ｂ３处与手柄Ａ点的振动传递函数值比其它大，而且Ｂ１的影响最主要；长轴上各激振点上下方向（ｚ方向）与Ａ点左右方向（ｘ方向）之间的传递函数在６０～８０Ｈｚ之间存在一个峰值
The paper analyzes the vibration spectrum of domestic DG3 brush cutter and the vibration transfer function between each vibration source and the handle. The results show that the vibration accelerations at working speed (6000r / min) are mostly concentrated in the range of 60 ~ 200Hz, and 76Hz, 100Hz and 152Hz are the three main dominant peaks, which are the main target frequency of vibration damping; Bearing B1 , The vibration transfer function values of B2 and B3 and the handle A point are larger than those of the other points, and the influence of B1 is the most important. The influence of the vibration excitation points in the up-down direction (z direction) and the left-right direction (x direction) The transfer function has a peak between 60 and 80Hz