基于动力吸振的变压器降噪方法研究

Research on transformer noise reduction method using dynamic vibration absorption

针对变压器低频噪声控制困难且线谱噪声特性明显的情况,提出了基于动力吸振的变压器噪声控制方法。首先,根据结构力学平衡关系建立附连动力吸振匀质板结构振动方程。进而,考虑将动力吸振以阻抗形式表征,建立附连动力吸振板结构理论分析模型。最后,为验证基于动力吸振技术的变压器降噪方法的有效性,开展了结构降噪性能分析。分析结果表明,动力吸振有利于如变压器类线谱噪声特性设备的减振降噪,动力吸振技术在电力设备减振降噪领域有较好的应用价值。

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.