Research On Automatic Optimization Method Of Spatial Layout Based On Urban Wind And Heat Environment

China is facing an unprecedented high-speed urbanization process.The increasingly intensive status of urban built-up regional buildings has brought a series of urban problems,and the deterioration of urban micro-climate is also one of the outstanding problems.For the urban planning and construction industry,it is necessary to make use of the latest technological achievements of multidisciplinary science and put forward an effective way to alleviate the pressure of urban environment and improve the quality of urban ecology and healthy environment and ensure the healthy and comfortable life of the urban population.This research takes this as a starting point and attempts to establish a set of scientific methods for automatic generation and optimization of urban design in combination with many technical measures such as architecture,urban planning and computer technology,in order to meet the needs of different levels of urban planning from the mesoscale partition planning to the more sub-scale scale urban design.In the research of the optimization method of mesoscale design,the theory of urban climate map is used as the core mechanism of optimization.The region is processed rasterization according to the need of data representation.Through the control module of the building density,height and other parameters to characterize the situation of different urban built-up area.Based on the minimum urban thermal accumulation,genetic algorithms is used to optimize the plan of different proportions and different distribution of different modules automatically.In the study of micro-scale design optimization method,this research first studied the mechanism of the influence of block morphological characteristics on the overall wind environment.This research use CFD software to establish semi-abstract model for simulation analysis and extract the characteristics of different models,such as the building density,height ratio,gap and other elements.Mathematical statistics is used to screen the morphological elements which impact the overall wind environment,and form a quantitative regression equation.On the basis of this,we use the Rhino Grasshopper software platform to study generation method of the building form and layout of micro-scale.The result data of the design of the mesoscale is taken as the generation condition in the microscopic scale design generation.The regression equation between the wind speed and the morphological factors is the genetic mechanism for the optimization mechanism.After the intergenerational inheritance and evolution,the optimal layout scheme of the wind environment is obtained.As the whole process of the design method of verification and application,the Shenzhen Shekou Four Seas Park Area is selected to generate the design layout as the actual situation study.The results show that software and genetic algorithms have good compatibility with the generation system of two scales.The system can stabilize the evolution direction under the concrete constraint condition of the actual case,and generate the ideal layout scheme.The rationality,stability and validity of the design optimization method and its related system proposed in this study are verified.