王正非-毛贤敏林火蔓延模型的扩展变换  

Extended Transformation of Wang Zhengfei-Mao Xianmin Forest Fire Spread Model

作　　者：李明贵 谢峰 LI Ming-gui;XIE Feng(Sichuan Forestry and Grassland Survey and Planning Institute,Chengdu 610081,China)

机构地区：[1]四川省林业和草原调查规划院,四川成都610081

出　　处：《四川林勘设计》2024年第2期10-14,共5页Sichuan Forestry Exploration and Design

摘　　要：在林火蔓延计算中,我国常采用王正非一毛贤敏模型计算上坡、下坡、左平坡、右平坡、风方向等5个方向的林火蔓延速度,但该模型可计算的蔓延方向偏少,不易计算林火蔓延面积。本文根据该模型中坡度角和风方向的投影方法,将5个方向的计算数据扩展为任意计算面,形成扩展模型,以方便在计算火场参数时,可采用CAD等绘图软件表达火场形态和计算蔓延面积。当采用椭圆形态计算蔓延面积时,扩展模型解决了传统利用上坡、下坡方向作为长轴,利用左平坡、右平坡和风方向不易确定短轴带来较大误差的问题,方便了模型的应用。In the spread of forest fires,the eWang Zhengfei-Mao Xianmin model to calculate the spread speed of forest fires Swere usually used in China in five directions:uphill,downhill,left flat slope,right flatslope,and 1wind direction.However,this model can only calculate a few spread directions,making it difficult to calculate the spread area of forest fires.The projection method of slope angle and wind direction in the Wang Zhengfei-Mao Xianmin model was used in this article to extend the calculation data from five directions to any calculation surface,forming an extended model.In this way,when calculating fire parameters,it is convenient to use drawing software such as CAD to express the shape of the fire and calculate the spread area.When using an elliptical shape to calculate the spread area,the extended model overcomes the problem of large errors caused by traditional use of uphill and downhill directions as the long axis,and the difficulty in determining the short axis using left,right,and wind directions,which facilitates the application of the model.

关 键 词：王正非一毛贤敏模型 模型变换 扩展模型 坡度角 火场面积 

分 类 号：S76[农业科学—森林保护学]