Optimal combination scheme for super-large cooling towers based on response targets

Abstract:

The selection of current cooling tower group is mainly based on load interference factor, which it is difficult to truly reflect the force characteristics of the cooling towers group. To study the four-tower combination optimization scheme based on the static wind response target and combined stress performance of super-large cooling tower in different four towers combinations, with the under-construction of the world's highest cooling tower(220 m) as the engineering background, the synchronous rigid body pressure measurement by wind tunnel tests were respectively carried out for five typical four towers combined cooling tower groups, including tandem, rectangular, rhombus, L-shaped and oblique L-shaped, totally having 320 working conditions. The surface wind pressure distribution pattern of cooling towers under different four tower combinations was obtained, and an integrated simulation model of "tower barrel-stanchion-ring foundation" was established based on the finite element method. The static wind responses of super-large cooling towers under three dimensional asymmetrical wind loads were analyzed respectively for different combinations, currents, wind directions and relative positions of towers, in which the influence law of four tower interference on the force and displacement response of the cooling tower under seven typical response targets was discussed. The influence degree and distribution law of different static response indexes were studied. Based on the static wind response target, the optimal scheme of the combination of four towers was given qualitatively. The results show that wind-resistant performance of the tandem layout is optimal, and the wind-resistant performance of the rhombic, oblique L-shaped, rectangular and L-shaped layouts are gradually reduced.