Wind-induced Interference And Flow Control Of Towering Structure Group

The tall structure refers to the structure with high height and smaller width.The most common is the self standing tower structure,which represents the form of a TV Tower,a chimney and a petrochemical tower.The flexibility of petrochemical towers is small and often adjacent to construction,resulting in different forms of destruction of petrochemical towers under wind-induced action.In this paper,the wind induced Canyon effect,wind induced interference effect and wind induced vortex induced vibration effect of the towering structure group are studied with three petrochemical towers of a petrochemical company in Daqing as the engineering background.First,the boundary layer of the wind tunnel was calibrated by the three-dimensional pulsating wind speed measuring instrument,and the wind Canyon effect was studied in various test conditions of the rigid model group of the scale chemical tower.Three dangerous points of the wind Canyon effect are put forward,and the speed acceleration of three dangerous points with different net distances is compared.It is found that the wind induced Canyon effect can increase to 30% of the test wind speed.Secondly,the high frequency force balance system is used to study the wind-induced interference effect of various experimental conditions of the rigid scale tower model of the scale chemical industry.The resistance coefficient,lift coefficient and torsional coefficient of the inter tower interference effect in different spacing conditions are given.It is found that the shielding range of the wind induced interference effect is from 0 to 30 degrees.Then,according to the code for wind resistance of the bridge,the B wind field geomorphology of the site of the chemical tower project is simulated.Combined with the experimental results of the wind induced Canyon effect and the wind induced interference effect between the chemical tower,the six force balance system is used to study the aerodynamic layout of the rigid model of the three chemical tower.Two different sites require different best construction plans.Finally,the vortex induced vibration effect and the control of vortex induced vibration flow of the downstream model are studied by using the hot wire anemometer and the acceleration sensing system.