Analytical Study On Vibration Control Of The Daqing TV Tower Under Wind And Earthquake

For TV Tower, its high supple characteristic causes the remarkable structural dynamic response under the wind load and the seismic excitations. The traditional method of seismic design and wind-resistant design is to dissipate the vibration energy through themselves ability, such as increases structural section, and enhances structural stiffness. When the structural response goes beyond the limit, the vibration control is the most effective way to ensure the safety of the completed tower.Research and application of intelligent materials for the structural vibration control technology has opened up a new world for the structure vibration control technology. At present, the research using Magnetorheological damper on control for vibrant responses of high-rise truss tower not to be many,Research has yet to be corrected and improved. This paper takes the Daqing television tower as the research object, and through this specific structure to analyze the application of Magnetorheological damper on the TV tower structure.The main research contents are stated as follow:Part 1: The mathematical model of the Magnetorheological damper is summarized and analyzed. The active control and the semi-active control algorithm have been researched. Using the Matlab procedure, the Simulink simulation technology has been used to carry on the simulation analysis for a 10-storey framework structure, and the results of analysis were compared.Part 2: It has conducted the research to the control device optimized arrangement, summarized the main several optimized method that present use. Based on the quadratic performance index, it analyzed optimal placement of control devices layout methods. And the arrangement way that obtained by this optimized method have been carried out the comparative analysis with other different arrangement ways.Part 3: A three-dimensional finite element model of the Daqing television tower was established by sap2000 software and analyzed the dynamic properties. According to the related assumption, three-dimensional finite element model of the Daqing television tower was concentrated to the multi- degrees of freedom dynamic model.Part 4: It simulated 21 pulsating wind velocity time-history of Daqing television tower using the wavelet analysis model. It analyzed the structure dynamic characteristics of the television tower under wind load and seismic as well as analyzed the control effect after the Magnetorheological damper was imposed.