Abstract:
Based on three-dimensional numerical simulation method, considering the landform and the influence of the adjacent building structure, combined with the position, the direction of the wind, the change of the parameters such as flow velocity, lines, the Wu-Puer bridge windshield shading effect characteristics were analyzed. The study shows that, under the influence of adjacent buildings, windshield shading effect in the middle is weaker than that on either side of the windshield; landform structure makes the vortex structure stronger near the windshield. The vortex structure of the east wind-break wall leads to the shading effect of the east side of the lower line much better than the shading effect of the upper line, with the speed reduction factor difference of about 27%, while the defferences between the middle and west sides is small. The change of flow velocity does not affect the screen shield effect. The increased wind angle increases the shielding effect of the windshield. The analysis results provide a reliable reference for the windshield anti-wind design and the safety operation of the train.