覆冰四分裂导线舞动数值模拟及参数分析  

Numerical simulation and parameter analysis of galloping for iced quadbundled conductor

作　　者：严波[1] 胡景[1] 周松[2] 张宏雁[3] 

机构地区：[1]重庆大学资源及环境科学学院工程力学系,重庆400044 [2]四川省电力工业调整试验所,四川成都610016 [3]四川电力试验研究院,四川成都610071

出　　处：《振动工程学报》2010年第3期310-316,共7页Journal of Vibration Engineering

基　　金：国家电网公司科技项目(2007-1-77);重庆市自然科学基金资助项目(CSTC;2009BB7367)

摘　　要：由于导线尾流相互干扰作用,覆冰分裂导线各子导线的空气动力特性存在差异。通过风洞试验获得典型新月形覆冰四分裂导线各子导线的空气动力系数随攻角变化曲线,为覆冰导线舞动数值模拟提供参数。利用ABAQU S有限元软件,通过梁单元自由度释放得到模拟覆冰导线的索单元,用用户自定义单元实现空气动力载荷的施加。对典型线路段舞动的数值模拟结果表明,考虑由于覆冰导线尾流效应引起的各子导线空气动力特性的不同后,导线舞动幅值明显增大。对覆冰四分裂导线的舞动进行参数研究,获得风速、覆冰厚度和线路档距等参数对导线舞动的影响规律,为覆冰四分裂导线舞动防止技术的研究奠定理论基础。The aerodynamic characteristics of iced sub-conductors is different from each other due to the wake interference of the sub-conductors in an iced bundled conductor.The aerodynamic coefficients of iced quad-bundled conductor varying with attack angle,which are the necessary data for numerical simulation of galloping for the conductor,were determined by means of wind tunnel test.A cable element with torsional degree used to simulate the iced conductor is obtained in ABAQUS software by releasing the bending degrees-of-freedom of spatial beam element and setting the material to be incompressible.The aerodynamic loads varying with attack angle are applied on the cable elements through the introduction of user defined element.It is illustrated that the galloping amplitude of the iced conductor as the wake interference is taken into account is obviously larger than those as wake interference is ignored.Furthermore,the effects of parameters such as wind speed,ice thickness and span length on the galloping for the quad-bundled conductor are numerically investigated,which provides a theoretical foundation for the development of the anti-galloping technology.

关 键 词：四分裂导线 舞动 尾流效应 数值模拟 参数分析 

分 类 号：TM752[电气工程—电力系统及自动化] V211[航空宇航科学与技术—航空宇航推进理论与工程]