Seismic Response Analysis Of Steel Tube Concrete Lattice Wind Turbine Tower

Traditional thermal power needs to burn a large amount of coal,which will cause great pressure on the environment.Therefore,people pay more and more attention to clean performance sources,such as wind power,hydropower and solar energy.The proportion of wind energy in China's total energy is still low,and the development potential is still large.Most regions rich in wind energy resources in China are located in the two major earthquake zones,so it is of great significance to study the anti-seismic performance of wind power towers.In this paper,finite element software is used to model the towers of the above two wind turbines,and the seismic responses under different peak accelerations are compared accordingly.For more quantitative research under different seismic wave and the lattice type steel tube concrete under different peak acceleration performance of the wind turbine tower,this paper analyzes the seismic vulnerability by using the method of IDA,examine its seismic performance in different levels under the action of earthquake and the chance of damage,for the reference for the research and design of wind turbine tower.The research contents are as follows:(1)The frequency of concrete-filled steel tube lattice type wind turbine tower is larger than that of steel cone type wind turbine tower,and the first six order revitalization of the tower can meet the requirements of the specification to participate in the quality of90%.(2)Two natural waves and one artificial wave were used to analyze the time history of the concrete-filled steel tube lattice wind turbine tower and the steel cone wind turbine tower.By comparing the acceleration response of the tower top,the displacement of the tower and the failure mode,the seismic performance of the concrete-filled steel tube lattice tower is better than that of the steel cone tower.(3)Lattice type wind turbine tower of steel tube concrete vulnerability analysis could get on the ground motion intensity of 0.1 g 0.15 g,beyond the overall instability of tower probability is small,not easy to damage during the ground motion intensity reached 0.2 g0.3 g,beyond the overall instability probability rise gradually,but the biggest beyond the overall instability probability is 10.6%,this shows that the tower collapsed under earthquake probability is relatively low...