Research on transformer noise reduction method using dynamic vibration absorption

In view of the fact that the noise generated by transformer is hard to control and has obvious low frequency line-spectral characteristics, a method using dynamic vibration absorption to reduce the propagation of transformer noise is proposed in this paper. Firstly, the dynamic equations of homogeneous plate with dynamic vibration absorption are established. Then, the theoretical analysis model of the plate with dynamic vibration absorption is built by considering the dynamic vibration absorber as impedance. Finally, the analysis of noise reduction performance of the transformer with dynamics absorption is made to verify the effectiveness of the proposed method. The results show that the dynamic vibration absorber could effectively reduce the noise with line-spectral characteristics, such as transformer noise, so it has great engineering application value for noise reduction and vibration reduction of power equipment.