模块化球形多面体网壳结构风压分布OA

When modular single-layer spherical polyhedral latticed shell structures are designed considering wind load,the wind load shape coefficient of an ideal rotating shell model is used.The wind pressure distribution results from this calculation method differ from the actual wind load conditions borne by the structure.First,a numerical simulation method was adopted in this study.The wind pressure distribution on a uniform and steady flow was studied for a modular membrane-type single-layer spherical polyhedral latticed shell structure with a diameter of 11.3 m.Next,the calculated wind pressure distribution results of the renormalization group k-ε(RNG k-ε)turbulence model were selected.These results were compared with wind tunnel test results.The reliability of the numerical simulation method was verified.Finally,the wind load distribution pattern of the modular spherical latticed shell structure was studied under the maximum design wind speed(67 m/s).The results show that the wind pressure on the structural surface exhibits a strip-shaped distribution.The maximum positive pressure appears at the middle-lower part of the windward side.The maximum negative pressure occurs at the top of the structural side face.The wind pressure curves at meridional 60° and meridional 90° show high fitting degrees.However,the wind pressure curve at meridional 30° exhibits some fluctuations.The wind pressure distribution law at 67 m/s is generally similar to that under medium-low wind speeds,and the wind pressure significantly increases.The findings can serve as references for the wind load design of modular spherical polyhedral latticed shell structures.