绿色建筑风环境模拟技术要点敏感性分析

Sensitivity Study on Key Factors of Wind Environment Simulation for Green Buildings

通过对工程领域绿色建筑案例进行调研发现,目前室外风环境模拟分析存在处理方法不规范、技术要点不完整、设定条件不明确等问题,导致模拟结果具有很大的不确定性,进而影响结果判断和方案设计。以某一理想模型为例,开展不同计算区域、网格划分、湍流模型选取、方程离散求解以及软件工具等因素下的风环境模拟计算数值试验,进行单因素影响分析以及多因素敏感性分析,进一步定量认识技术要点对建筑风环境模拟结果的影响程度,为提高风环境模拟规范化水平及指导工程应用提供参考。

By surveying cases related to wind environment simulation of green buildings, some important problems were found, such as the non-standard processing method, incomplete main technology factors and unclear set conditions, which resulted in the poor guidance of simulation results. Therefore, taking an ideal model for example, this paper carried out wind environment simulation numerical experiments on different computing areas, meshing, turbulence model selection, and discrete solution and software tools; in addition, one-factor influence analysis and multi-factor sensitivity analysis were both performed to further quantitatively understand impacts of techniques on wind environment of building. The study helped to guide and regulate standardization processes of wind environment simulation and provide a reference for practical engineering application.