Wind Tunnel Load Test Of 1000kV Uhv Transformer Truss And Research On Vibration Response

Since the beginning of the 21 st century,industrial production and residents’ living demands for electric power resources have been increasing day by day.In order to meet the growing demand,China has adopted the development strategies of "west-to-east power transmission" and "north-to-south power transmission",and vigorously developed the uhv ac-dc transmission backbone network.With the construction of 1000 kV uhv transmission network in China,the safety and reliability of the key structures in the network have gradually attracted the attention of designers.The 1000 kV ultrahigh voltage substation framework is an important structure of the substation,which mainly adopts lattice steel tower.Its span size and structural height are more complex than those of 500 kV,330kV and 220 kV,and the consequences caused by damage are more serious.Wind load is an important load to control the design of the high rising structure.At present,domestic and foreign scholars pay more attention to the wind vibration response of uhv transmission tower and uhv transmission tower line system,but less attention is paid to the wind vibration response and wind vibration coefficient of uhv substation structure,and there are no relevant reports on the research of uhv substation structure.In order to guide wind resistance and system design of uhv substation framework,wind tunnel test and numerical simulation of the system are carried out in this project.The specific research results are as follows:1)This paper,taking the first uhv project-weifang city,shandong province yulin-hengshan-weifang 1000 kv uhv ac power transmission and transformation project as the research background,1000 kv substation frame rigidity model of high frequency force balance wind tunnel test,using the segmental model calculated by the strain results different segmental model and integral model of shape coefficient and specification.2)Introduces the whole process of rigid model load test,combined with the large finite element analysis software ANSYS based on the method of time history analysis on the structure under different wind Angle and ground rough categories of wind vibration response analysis,the most unfavora ble wind direction Angle of the architecture is given,and compared the structure different location at the same time the wind vibration coefficient of node,wind vibration coefficient of wind resistance design method is given in the recommended value.3)Using the existing structural optimization design method,combining the wind conditions,icing conditions,installation conditions and maintenance conditions,the section optimization of the existing structure is carried out,and the analysis and optimization results are given.At the same time,the seismic tes t of the optimized structure is carried out to verify the feasibility of the optimization results.