多物理场耦合所致的变压器本体噪声研究

The extensive utilization of electrical resources and development of the power industry has enabled the rapid progress of the Chinese economy and society. The construction of AC and DC transmission networks is a critical part of this development. However, while serving the purpose of this development, these transmission networks also generate noise pollution. Transformer noise contributes most significantly to this pollution. Thus, this project deals with the issue of transformer noise by investigating the characteristics of the vibration source and the mechanisms of multiple wave coupling and propagation in transformer substructures. This project studies the effects of the periodic features of the substructure on the coupling, and the effects of the scattered magnetic field by the discontinuities in the core structure on the magnetostrictive and induced electromagnetic forces. This project aims to provide a clear understanding of mechanisms for the production and transmission of noise radiated from the transformer tank, and to develop efficient models and methods for the prediction of this noise. This research will form a foundation theory and methodology for designing and manufacturing ultra–low noise transformers.

电力资源的广泛应用和电力工业的大力发展是我国经济、社会快速发展的重要保障。交直流输电网络的建设是这一保障的关键环节。密集的电网分布给各行业发展带来便利的同时，也给当地居民造成了一种特殊的、具有谐波特征的噪声污染—电磁场激发的结构声辐射。变压器噪声被认为是这种噪声污染的重中之重。本项目拟从变压器振动的产生和传播上探索变压器的噪声问题。通过研究（1）磁场在铁心结构参数不连续区域的散射及其所致的磁致伸缩和感应电磁力、（2）各周期子结构内弹性波通过耦合边界相互作用并导致变压器本体噪声，掌握变压器振动激发和传播的机理，并建立预测它们的模型和方法，为设计制造低噪声变压器提供理论和方法上的支持。

电力资源的广泛应用和电力工业的大力发展是我国经济、社会快速发展的重要保障。交直流输电网络的建设是这一保障的关键环节。密集的电网分布给各行业发展带来便利的同时，也给当地居民造成了一种特殊的、具有谐波特征的噪声污染：电磁场激发的结构声辐射。变压器噪声被认为是这种噪声污染的主要来源之一。本项目从变压器振动的产生和传播特性上探索了变压器的噪声问题。主要研究内容包括：（1）磁场在铁心结构参数不连续区域的散射及其所致的磁致伸缩和感应电磁力；（2）各周期子结构内弹性波通过耦合边界相互作用并导致变压器本体噪声。基本掌握了变压器振动激发和传播的机理，并建立铁芯、绕组及装配体的体积力、振动预测模型，为设计制造低噪声变压器提供了理论和方法上的支持。