Research Of The Wind-Induced Response Of The Transmission Tower-Line System By Vector Form Intrinsic Finite Element

As the lifeline of power system,the insiders always pay much attention to the safety of the transmission tower-line system.the transmission tower-line systems around the world often damage or destory by strong winds.Therefore,using effective simulation to analyse the transmission tower-line system forced by strong wind load,it's of great significance.At present research on the wind-induced response of transmission tower-line system is primarily based on the traditional finite element method,there are still many critical issues yet to be resolved.Especially in analysis of nonlinear large deformation of the transmission line system,the traditional finite element method has great limitations.Based on the lack of current research,this paper establish a new method by using Vector Form Intrinsic Finite Element(VFIFE)to analyse the transmission tower-line system,and use this method to research the transmission tower-line system wind-induced response caused by the monsoon and typhoon loads.This paper first introduced the background and significance of the transmission tower-line system research.The status and progress of research studies on its response are also summarized.Then introduces the Vector Form Intrinsic Finite Element used in this paper.In the following sections,the traditional finite element method and VFIFE method are both introduced and derivated.This paper establishes two new methods to analyse the transmission tower system and the transmission line system by using VFIFE.By combining these two methods,this paper establish a new way to analyse the transmission tower-line system by using VFIFE.This paper derives and establishes the nodes' equations including motion equations,coordinate transformation equations and internal force conversion equations.Research on the dynamic coupling effect of transmission tower-line system and summarize the characteristics of the dynamic characteristics of the transmission tower-line system.This paper establishes the monsoon load model of transmission tower-line system by VFIFE,and analyses its' wind-induced response.Then,this paper calculates the effects of transmission tower-line system under strong monsoon load and summarize the characteristics of the strong monsoon effect based on VFIFE.Compared with the calculation results of ABAQUS,the results verify the correctness of the analysis methods of transmission tower-line system based on VFIFE.Further,this paper establishes the typhoon load model of transmission tower-line system by VFIFE,and analyses its' wind-induced response.Then,this paper calculates the effects of transmission tower-line system under strong typhoons load and summarize the characteristics of the strong typhoon effect based on VFIFE.Use its' results to complete the signal analysis and processing.Study on the time and frequency domain's response characteristics of transmission tower-line system in monsoon and typhoon under dynamic loads based on HHT method.At last,what has been researched in this paper is given,with the results summary and conclusions is also showed.The insufficient of this paper and the outlook of the research are also pointed out.