【作者】 陈峥； 许晨豪； 蒋崇文；

【Author】 Chen Zheng;Xu Chenhao;Jiang Chongwen;National Laboratory for Computational Fluid Dynamics,School of Aeronautics Science & Engineering,Beihang University;

【机构】 国家计算流体力学实验室航空科学与工程学院北京航空航天大学；

【摘要】 为了评估戈壁风沙环境下沙粒撞击对建筑结构的影响,采用欧拉-拉格朗日方法模拟风沙流过程。传统方法在研究建筑表面沙粒撞击压问题时,需要计算所有沙粒的轨迹,计算量巨大。为降低计算量,引入风驱雨研究中的有限区域计算方法计算建筑墙面的沙粒撞击压。该方法仅需计算最终落在区域角点上的沙粒轨迹,相比传统方法可显著降低计算量。分别采用传统方法和有限区域方法,计算不同风速条件下建筑表面的沙粒撞击压分布以及沙荷载。结果表明,两种方法所得到的沙荷载误差小于1%,验证了该计算方法的准确性;当风速为56m/s时,建筑受沙荷载占风荷载的42.4%,表明在强风沙流环境下沙粒撞击压对建筑结构的影响需要考虑。更多还原

【Abstract】 In order to assess the influence of the impact by sand on building in Gobi environment,the Euler-Lagrange method is utilized to simulate wind sand flow.When traditional method is used to calculate sand collision pressure on the building,a large amount of sand trajectories need to be calculated.In order to reduce the cost of calculation,the finite panel method is used to calculate the sand collision pressure on building.Compared to the traditional method,this method only need to calculate sand trajectories falling onto the corner points of the panels,hence it greatly reduces the cost of calculation.The traditional method and finite panel method are utilized sequentially to calculate sand pressure on buildings in different wind conditions.The result show that the difference of sand pressure calculated between two methods is less than 1%,which demonstrates the accuracy of this method.While the wind speed is 56 m/s,sand load on the building occupy 41.5% of wind load,which shows that in strong wind sand flow sand collision pressure on building need to be considered.更多还原