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目的:风环境直接影响居住建筑室内外自然通风、舒适度以及污染物扩散情况。本文以居住建筑选址分析为目的,建立一系列针对东亚沿海岙型地形的风环境评价方法,分析影响风环境特点的主要因素,提出风适宜度评价模型,探讨风环境与主要地形因子之间的相关性。创新点:1.建立东亚沿海典型岙型地形的分类数据库;2.提出基于选址分析的风适宜度模型;3.建立风适宜度与地形因子之间的回归模型。方法:1.通过CFD模拟的方法,计算典型工况下20种岙型地形的风场(图5);2.通过理论分析和数理耦合的方法,构建风适宜度模型(公式(4));3.通过Logistic回归方法,分析风适宜度与地形因子的相关性。结论:1.风适宜度直接受地形特征影响,开口面向来风向的岙型地形中风适宜度平均值最高,选址过程中应避开开口背向来风向的岙型地形;2.通过多元回归分析得出风适宜度和地形因子的相关性显著,其中海拔是决定风适宜度的主要地形因子。
Purpose: The wind environment directly affects the indoor and outdoor natural ventilation of residential buildings, comfort and the spread of pollutants. In this paper, a series of wind environment assessment methods are presented for the analysis of site selection of residential buildings. Based on the analysis of the main factors that affect the characteristics of wind environment, a wind evaluation model is proposed to explore the relationship between the wind environment and the main terrain factors Relevance. Innovative points: 1. To establish a classification database of the typical 岙 terrain along the coast of East Asia; 2. To propose a wind-suitability model based on site selection; 3. To establish a regression model between wind suitability and topographical factors. Methods: 1. Calculate the wind field of 20 types of 地-shaped terrain under typical conditions by CFD simulation (Figure 5); 2. Construct wind-suitability model (formula (4)) by theoretical analysis and mathematical coupling method ; 3. Logistic regression method was used to analyze the correlation between wind suitability and topographic factors. The wind suitability is directly affected by the topographic features, and the mean value of suitability of wind-induced terrain in the windward direction is the highest. The location of the wind-induced terrain should avoid the 岙-shaped terrain with the opening facing away from the wind direction. 2. By multiple regression analysis The correlation between wind suitability and topographic factors is significant. Elevation is the major topographic factor that determines wind fitness.