摘要
以温州机场新航站楼工程为背景,通过在数值模拟平台上建立数值风洞模型,对工程在考虑临近建筑干扰的工况下的平均风荷载进行了数值模拟仿真。在数值风洞模型中,着重对自保持平衡大气边界层的模拟进行了仔细考察。在基于提出的新的湍流来流边界条件下,对所使用的SSTk-ω湍流模型中的参数以及地面边界的粗糙度参数进行适当选取,使得这一计算风工程数值模拟中非常重要但同时难以解决的前提问题得到很好解决,从而避免了由于边界层的不恰当模拟引入的误差。对影响钝体绕流计算结果的重要因素诸如计算域构造、网格离散、湍流封闭模型、对流项离散格式等进行了仔细选取,从而提高了数值模拟的精度。
The mean wind loads of New Wenzhou Airport Terminal considering the interference effect of neighboring building are calculated through constructing appropriate numerical model. In the numerical simulation, the important precondition for numerical simulation, i.e. the modeling of the self-sustaining equilibrium Atmosphere Boundary Layer （ABL）, had been emphasized and investigated. Based on a new set of inflow turbulence conditions and combined with the proper parameters in SST k-ω turbulence model and the rough wall model, it made this important but difficultly solved precondition be satisfied well. Thus the errors caused by the improper modeling of ABL had been avoided. Besides, several important numerical parameters which would affect the results heavily, such as the calculation domain, mesh resolution, turbulence models and differencing scheme of convective terms had been considered carefully and the accuracy of numerical simulation had been improved.
出处
《建筑结构》
CSCD
北大核心
2007年第8期100-103,107,共5页
Building Structure
