Research On Wind Environment Simulation And Optimization Strategy Of Urban Public Space

The experience of wind environment comfort in urban public space is inseparable from the sustainable development of the city.The construction of a three-dimensional city has brought about a series of urbanization problems,and the awareness of the comfort and safety of the urban public space wind environment has gradually increased.The wind environment problem has now become one of the main contents of urban planning and design.The meaning of urban public space itself is relatively broad,and the performance of ancillary space is the representative of diversified integration.Therefore,the research and management system of planning strategy is more pertinent.Combining the typical characteristics of urban public spaces with sustainable development strategies can better prevent and respond to the generation of downwind environmental problems in urban public spaces.This article takes Shanghai city as the research object,mainly discusses and researches from three aspects.The first is the research on the basic theory of wind environment in Chapter 2.Comprehensive research on the concept of wind environment,wind environment research methods,wind environment simulation parameters and boundary conditions construction,wind environment comfort evaluation system and related policies,sort out and summarize wind environment comfort criteria,and apply and simulate wind environment models Analyze,discuss relevant measures to effectively deal with the wind environment problems in urban public spaces,and build an overall article framework and acting ideas.Secondly,Chapter 3 and Chapter 4 are the research on the main content.First use the Arc GIS information data processing platform to obtain the distribution of agglomerated public spaces in Shanghai,analyze the characteristics of the wind environment in Shanghai,carry out the concrete modularization of Shanghai public spaces,analyze the module characteristics of different types of spaces in each area,and summarize the four types.The main influencing factors in the space;according to the influencing factors,the on-site wind speed measurement and recording of the four types of sites are carried out,and the characteristics of the instantaneous wind speed of the site are summarized.The fluid computing software Phoenics is used to model the space,and the simulated space modules are classified and compared,and the main wind environment problems existing in four different types of public spaces are analyzed.Then calculate and analyze the correlation between spatial characteristics and wind speed to compare the common points and differences of public space in Shanghai.The last chapter five is the design and optimization of wind environment in public space.From the perspective of pedestrian comfort and safety,the overall optimization direction of the wind environment in public spaces in Shanghai is divided into two aspects: under-space ventilation and wind protection.The nodes and optimization elements that are more prominent for the four typical wind environment problems are divided into three main levels: street ventilation corridors,buildings and surroundings,and landscape greening adjustment.According to the characteristics of the wind environment and site advantages of each level,it is proposed to improve the wind environment.The overall optimization design strategy.Ventilation issues are mainly concentrated in summer,and the building scale and landscape greening level jointly affect the wind environment of urban public spaces;the wind protection issues are mainly optimized for street openings and high-rise buildings.Among them,the commercial space street air duct environment is mainly based on ventilation and wind protection,the waterfront space building wind environment is mainly summer ventilation of the main building group,the residential space is mainly composed of row and enclosed group buildings,and the open space is mainly landscaped.Mainly shelter the square from wind.