基于有限元法的输电线风荷载分析  

Wind Loading Analysis of Transmission Lines Based on Finite Element Method

作　　者：刘勇[1] 赵冀[1] 赵阔[1] 朱睿[1] 汪韧[1] 

机构地区：[1]重庆市电力公司江津供电局,重庆402260

出　　处：《重庆科技学院学报（自然科学版）》2010年第5期171-174,181,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：重庆市电力公司项目

摘　　要：由于输电线的风载荷易造成输电线及杆塔的损坏,严重影响电力电网的正常运行,输电线的风载荷分析是对自然的随机风场引起的随机风力,采用一种适用而有效的顺风向荷载模拟方法进行描述。在输电线舞动的计算机仿真过程中,采用有限个梁单元模拟输电导线状态,利用最小位能原理推导出有限元方程,结合计算实例运用AN-SYS进行模态和谐响应分析,为今后线路的优化设计提供依据。Recent years, with the progress of modem industry, power-electronic equipment is widely used in power system concomitant high quality.However, the accidents that transmission lines and pole tower are damaged by the wind loading have seriously influenced normal operation of power grid. The wind loading analysis of the transmission is helpful to better solutions of transmission lines and pole tower.A valid and praclical method is introduced to simulation the random wind force caused by the random wind field in the natural condition. Finite element method is used to simulation conductors galloping, and the principal of minimum potential is utilized to derive the finite element equations. Finally, an example is given to do the modal and harmonic responding analysis by ANSYS. Though the result of analysis, some suggestions on optimum design of transmission lines can be proposed.

关 键 词：舞动 有限单元法 风荷载 仿真 

分 类 号：TU312[建筑科学—结构工程]