Analysis of Wind-Induced Vibration Response of High-Rise Structure of Heat Sink Tower Based on Large Eddy Simulation: Fid-Bau Portal

Analysis of Wind-Induced Vibration Response of High-Rise Structure of Heat Sink Tower Based on Large Eddy Simulation

Feng, Ruoqiang / Zhong, Changjun / He, Jing

Taking the heat absorption tower of Dubai photothermal project as the research object, a three-dimensional finite element model of the high-rise structure of the heat absorption tower is established by using large eddy simulation technology and a new generation method of turbulent fluctuating flow field—Random Number Recycling Method. Then the rationality of random number cyclic pre simulation method is analyzed. On this basis, the turbulent boundary conditions of the flow field around the heat absorption tower structure are simulated, the wind flow field and wind load time history data around the structure are obtained, and the modal analysis and wind vibration response analysis are carried out. In addition, the effects of tower top wind speed, wind direction angle and damping ratio on wind-induced vibration response are explored, and the effects of cross wind vortex induced vibration and wind break ring on vortex induced vibration are analyzed. The results show that it is reasonable to use the random number cyclic pre simulation method as the inlet boundary condition of large eddy simulation. Secondly, the actual critical wind speed at the top of the tower for vortex induced resonance of the high-rise structure of the heat absorption tower is 63 m/s, and the most unfavorable wind angle is 75°. In addition, for this kind of high-rise structure of heat absorption tower, the recommended value range of damping ratio is 0.15–1%. In addition, the setting of wind break ring makes the average decrease of structural displacement and internal force up to 39.3%, which effectively reduces the influence of cross wind vortex induced resonance.