中国电机工程学报2024，Vol.44Issue(4)：1662-1674,封3,14.DOI:10.13334/j.0258-8013.pcsee.230684
基于改进声学有限元法的主变压器室噪声场计算
Calculation of Noise Field in Main Transformer Room Based on Improved Acoustic FEM
摘要
Abstract
The traditional acoustic finite element method(FEM)is difficult to accurately characterize the change of air medium parameters in the large space of the main transformer room caused by the temperature rise effect,resulting in the large calculation error of the noise field in the main transformer room of the substation under the coupling effect of temperature field and sound field.Based on the acoustic FEM algorithm,computational fluid dynamics(CFD)is innovatively introduced to extract the complex spatial medium parameters of the large space main transformer room,and the wave integral equation is improved,and a noise field solution algorithm in the main transformer room based on the improved acoustic FEM is proposed.Firstly,the rheological model of the main transformer chamber under the influence of temperature field is established,and the discrete space medium parameters of the large space temperature field of the main transformer chamber are characterized by CFD;Then,based on the fluid-acoustic grid mapping theory,the discrete space medium parameters of the temperature field are mapped to the acoustic grid,and the acoustic FEM integral equation is established after correcting the air medium parameters in large space;Finally,based on the conventional Gauss numerical integration method and the introduction of Kirchhoff-Helmholtz equation,the modified acoustic FEM integral equation is jointly solved.The algorithm has been successfully applied to the solution and analysis of the noise field in the No.1 main transformer room of Xi'an 110 kV Changming Substation,with an error of 2.168%from the measured value.关键词
户内变电站/噪声场/声学有限元法/计算流体力学/温-声耦合场Key words
indoor substation/noise field/acoustic FEM/computational fluid dynamics(CFD)/thermoacoustic coupling field分类
信息技术与安全科学引用本文复制引用
唐波,刘思煜,白晓春,陈国庆,蔡晨林..基于改进声学有限元法的主变压器室噪声场计算[J].中国电机工程学报,2024,44(4):1662-1674,封3,14.基金项目
国家电网公司科技项目:基于多场协同理论的高温大负荷户内变电站降噪技术研究(5226SX21001C). Science and Technology Project of State Grid Corporation of China:Research on Noise Reduction Technology of Indoor Substation in the Condition of High Temperature and Large Load Based on Multi-field Collaborative Theory(5226SX21001C). （5226SX21001C）
