机械科学与技术2018，Vol.37Issue(7)：985-991,7.DOI:10.13433/j.cnki.1003-8728.20180002
最小二乘法估算变压器绝缘件瑞利阻尼系数的可行性研究
Feasibility Study on Estimating Rayleigh Damping Coefficients of Insolation used in Transforms by Least Square Method
摘要
Abstract
Based on the basic concept of Rayleigh damping,the basic expression of Rayleigh damping is deduced.The Rayleigh damping coefficients of structural components can be calculated by the least square method and its feasibility is verified.The laminated wood and laminated paperboard used in transformers are taken as the example,their prominent modes are obtained in the dominant frequency bands by the hammering tests.The different Rayleigh damping coefficients of them were calculated by the three existing methods and the proposed least square method,and the results are compared with the those of classical method.In addition,the harmonic responses of laminated wood and laminated paperboard under the same boundary conditions and different damping coefficients have been carried out by FEM(Finite element method) with ABAQUS software.The results show that the Rayleigh damping coefficients obtained by all methods,and the trend of the displacement response of the harmonic response analysis are almost identical.The more modes are adopted in the least square method,the smaller the errors are.It is proved that calculating the Rayleigh damping coefficients of structural components by the least square method is feasible.关键词
瑞利阻尼系数/最小二乘法/锤击试验/谐响应分析Key words
Rayleigh damping coefficients/least square method/hammering test/harmonic response analysis分类
机械制造引用本文复制引用
王尚,杨振元,王威强,李福鹏..最小二乘法估算变压器绝缘件瑞利阻尼系数的可行性研究[J].机械科学与技术,2018,37(7):985-991,7.基金项目
国家电网科技项目(SGTYHT/14-JS-188)资助 （SGTYHT/14-JS-188）
