考虑流固耦合与脉动风效应的截椭球形充气膜结构的风压分布研究

Research on Wind Pressure Distribution of Truncated Ellipsoid Air-Supported Structure Considering Fluid-Solid Interaction and Fluctuating Wind Effect

研究了考虑流固耦合与脉动风效应下某截椭球形充气膜结构的风压分布特性。首先,利用线性滤波器法在MATLAB中得到的脉动风速时程数据并导入Fluent中。其次,通过Workbench 17.0平台的分区弱耦合算法数值模拟得到了风致响应稳定后不同风向角、高度、内压下结构的风压系数。结果表明,考虑流固耦合时结构的负压系数极值明显变大;三个变量对结构风压系数分布、大小和变化幅度都有一定程度的影响,其中在400 Pa时能保证结构风压极值保持在较低水平。

The characteristics of wind pressure distribution of an ellipsoidal air-supported structure considering fluidstructure interaction and fluctuating wind effect were studied.Firstly,the time-history data of fluctuating wind speed obtained in MATLAB by using linear filter method was imported into Fluent.Secondly,the wind pressure coefficients of the structures under different wind direction angles,heights and internal pressures after the wind-induced response stabilized were obtained by the partitioned weakly coupled algorithm on Workbench 17.0 platform.The results showed that the extreme values of the negative pressure coefficient increased obviously when the fluid-structure interaction was considered.The three variables had influence on the distribution,magnitude and changing rate of wind pressure.The wind pressure extreme values of the structure could be kept at a low level at 400 Pa.