多档覆冰悬索结构的动力学建模及驰振分析  

Dynamic Modeling and Galloping Analysis of Continuous Span Iced Cable

作　　者：闵光云 刘小会[1,2] 郑佳艳[1] 蔡萌琦 孙测世[1] MIN Guangyun;LIU Xiaohui;ZHEN Jiayan;CAI Mengqi;SUN Ceshi(College of Civil Engineering,Chongqing Jiaotong Univ.,Chongqing 400074,China;State Key Laboratory of Bridge&Tunnel Engineering in Mountain Areas,Chongqing Jiaotong Univ.,Chongqing 400074,China;School of Architecture&Civil Engineering,Chengdu Univ.,Chengdu 610106,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆交通大学省部共建山区桥梁及隧道工程国家重点实验室,重庆400074 [3]成都大学建筑与土木工程学院,成都610106

出　　处：《三峡大学学报（自然科学版）》2020年第4期71-77,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(51308570,51808085,51507106);重庆市科委基础科学与前沿技术研究(CSTC2017jcyjAX0246);重庆市研究生科研创新项目资助(CYS19240)。

摘　　要：根据哈密顿变分准则与Galerkin法得到单档覆冰悬索的驰振控制方程,以绝缘子串处转动平衡方程为桥梁建立了多档覆冰悬索的驰振控制方程组,最后采用四阶Runge-Kutta求解该方程组.数值算例表明:由于悬索和绝缘子串之间存在相互作用,使得相等档距的悬索结构中每一档悬索的位移响应存在一定的差异,且由于绝缘子串存在不同的偏摆组合形式,不同的偏摆组合下悬索的位移响应也存在着一定的差异.本研究建立的多档悬索模型比传统的单档悬索模型更符合实际工况,能给予实际工程重要的参考价值.According to the Hamiltonian variational criterion and Galerkin method,the galloping control equations of single ice-covered cables are obtained,and the galloping control equations of multi-step ice-covered cables are established based on the rotational equilibrium equation of insulator strings,and then the fourth-order Runge-Kutta method is used to solve the equations.The numerical results show that due to the interaction between the suspension cable and the insulator string,there is a certain difference in the displacement response of each cable in the suspension structure with the same span.Because the insulator string has different yaw combinations,there are also some differences in the displacement response of the suspension cable under different yaw combinations.The multi-span suspension model established in this paper is more in line with the actual working conditions than the traditional single-stage suspension model,and can give important reference value to the actual project.

关 键 词：悬索桥梁 多档 动张力 驰振 

分 类 号：TU311[建筑科学—结构工程] TM752[电气工程—电力系统及自动化]