CFD Numerical Simulation Study Of Wind Environment And Wind Load Of Zhuhai Opera House

With the society developing, the height and complexity of the building are rising.The wind is becoming the important load during structural design. Zhuhai OperaHouse locates on the Wild Pagumogonimus Island, which is in the east of XiangzhouDistrict of Zhuhai City. It will be the one landmark of Zhuhai City, and the one of theentire Pearl River Delta. The structure belongs to wind-sensitive structure, whosehorizontal projection span reaches130m. Therefore, it is necessary to monitor real-time wind pressure of the structural surface during the operational phase. Based onthe CFD numerical simulation method, the article studies the impact of wind onZhuhai Opera House. And it explores the way of joint work between limited pressuresensors and mathematical models to get the real-time wind pressure of any point onthe structural surface. There are three main research.The CFD numerical simulation of the wind load distribution on the surface ofZhuhai Opera House. This part is based on the ANSYS FLUENT14.5softwareplatform. The simulation has been done under12wind angle. Comparing the regionalshape coefficient between the method of CFD numerical simulation and that of windtunnel experiment, we can verify the accuracy of CFD numerical model and analyzethe wind load distribution on the structural surface. After calculation, compare theregional shape coefficient. We can get the conclusion: the wind load distribution of12wind angles by two ways are almost the same. However, there are some differencein individual angle direction. The deviation may be caused by the some detailsneglected during the wind tunnel experiment, or the mesh problem in CFD simulationresults the difference.Limited sensors predict the wind load value of the point, which has randomlocation on the target region. The study is based on the CFD numerical simulationexperiment results obtained in the first part of the article. A limited number ofpressure sensors joint work with the corresponding mathematical models to realizethe task, which is making use of32pressure sensors to monitor the structural windpressure on the surface on the real time. In this paper, we make use of the BP artificialneural network to build the mathematical model. After calculation, we can get: Under12direction angle, the maximum relative error of prediction samples measuring point predicted value and the true value is9.60%, the maximum average was2.43%with astandard deviation of a maximum of2.78%; prediction sheet1the maximum relativeerror of the outer surface of the entire area of the surface pressure of5.822%and aminimum of0.002%, with an average of0.886%, a standard deviation of1.063%.The research of assessing the wind environment of pedestrian around the ZhuhaiOpera. Since there is no standard of wind environment assessment criteria, we adopta joint assessment criteria in this paper. During the evaluation process, we use theway of beyond a threshold probabilistic assessment to evaluate two indicators of windenvironment. We adopt the CFD numerical simulation to the study wind environmentaround Zhuhai Opera at eight angle directions. Evaluate two level of the windenvironment. The first level is comfort level, and the second level is the dangerouslevel. After assessment, we can get the pedestrian comfort level is excellent. However,it's not suitable for people sit or play for a long time. At the same time, the dangerlevel is safe.