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风速与风向联合分布在工程规划、结构设计以及风能资源评价等方面应用广泛。风玫瑰图是目前分析风要素常用的手段,不足之处在于该图只能表示特定16个方位各级风力的频率分布情况。基于连续型角度-线性联合分布模型,该文提出了根据风玫瑰图建立联合分布模型的新方法,并绘制了一种新型且在风速及风向上均连续的风频分布图。以辽东湾长兴岛站的风测数据为例,建立风速风向联合分布模型,绘制风速风向联合分布图。结果表明:1)统计模型可靠性高,与原始风向风速分布相关性极强;2)联合分布模型相比风向离散的风速分布模型,可以更好地反映邻近方位之间风速分布的相互影响;3)新的联合分布图给出了全方向的风频理论分布,克服了传统风玫瑰图中仅有16个风向的不足。
The joint distribution of wind speed and direction is widely used in engineering planning, structural design and wind energy resource evaluation. The wind rose map is the common method used to analyze the wind elements at present. The disadvantage is that the map can only represent the frequency distribution of the wind at all 16 levels. Based on the continuous angle-linear joint distribution model, this paper proposes a new method to establish a joint distribution model based on wind rose diagram, and draws a new type of wind frequency distribution diagram which is continuous both in wind speed and wind direction. Taking the wind measurement data of Changxing Island Station in Liaodong Bay as an example, a joint wind speed and wind direction distribution model is established and a joint wind and wind direction map is drawn. The results show that: 1) The statistical model has high reliability and strong correlation with the wind direction of the original wind direction; 2) The wind speed distribution model of the joint distribution model can better reflect the wind speed distribution between adjacent positions; 3) The new joint distribution gives an all-directional wind-frequency theoretical distribution, overcoming the shortcomings of only 16 wind directions in the traditional wind rose map.