泥石流沟岸耦合三维数值仿真

泥石流具有强烈的破坏作用,泥石流与沟岸耦合作用导致岸坡破坏是山区沿河公路发生泥石流毁损的根本原因.在天山公路泥石流K630模型试验的基础上,基于流固耦合基本理论,采用三维数值仿真的方法,利用k-ε模型对泥石流沟岸耦合机理进行了仿真,得到了流体域与固体域的耦合云图与矢量场.通过对流体压力梯度场和应力场、速度场的分析,得到了泥石流沟岸耦合三维链式冲击作用规律.通过实体模型试验分析显示,三维数值仿真与试验实测规律吻合较好.

Numerical Simulation on Coupling Problem between Debris Flow and Bank of Debris Flow Valley

Compared with the traditional welding truss-column in shape of A, the members of the bolting top-joint are much smaller than the common welding joint. Furthermore, the members are more convenience on fabrication, transportation and installation. It should be noted that the zinc process is much easier and cheaper. In this paper, by using the finite element method, the effect of many factors to the global stiffness and the intensity of the bolting truss-column are analyzed; the factors include the column height, the root width to column height ratio, the tube thickness, etc. The results obtained are favorable references for design and optimization of the bolting