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| CFD simulation of wind-induced snow pressure on folded reticulated shell structure |
| Received:December 12, 2016 Revised:May 06, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20161212003 |
| KeyWord:folded reticulated shell snow drifting numerical simulation turbulent model snow distribution |
| Author | Institution |
| 颜卫亨 |
长安大学 建筑工程学院, 西安 |
| 何立勇 |
长安大学 建筑工程学院, 西安 |
| 吴东红 |
长安大学 理学院, 西安 |
| 杜书朝 |
长安大学 建筑工程学院, 西安 |
| 赵有栓 |
长安大学 建筑工程学院, 西安 |
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| Abstract: |
| To investigate distributions of wind-induced snow pressure on folded reticulated shell structures,a numerical simulation was conducted herein.According to the Euler-Euler method and the fundamental assumption that air and snow are one-way coupled,a numerical model was established to simulate the snow pressure around the cube firstly by Computational Fluid Dynamics (CFD) software——ANSYS Fluent.On the basis of the mixture model theory and considering the snow erosion and deposition on walls,the simulation results were obtained and compared with the measured results.Moreover,the key technology and parameters of the numerical wind tunnel are discussed.It is confirmed that the three-equation k-kl-ω turbulent model has better simulation results of air-snow two-phase flows.Based on this,regarding the wind speed and the wind direction as variable parameters,the wind-induced snow pressure on a folded reticulated shell structure was simulated.The results indicate that the sustaining action of the lower wind speed (under 10 m/s) is the worst condition,and affected by the wind direction,the snow erosion and deposition occur in different areas.The snow distribution generally shows f erosion for the windward area and local deposition on the leeward area.And the relative increase of snow distribution coefficient of the same partition under different wind direction is up to 1.28.Through the simulation,the snow distribution coefficient was obtained,which may provide theoretical guidance for the wind and snow resistance design of similar structures. |
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