泥石流沟岸耦合三维数值仿真

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

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。

Debris flow has strong impact and destroying energy, and the interior action of the debris flow along the highway in the mountainous area is the ultimate reason to cause the highway destroy, the authors based on the experiment of the Tianshan highway K630 model and on the FSI theory, use k-ε model to simulate the debris flow. The solid and fluid domain coupling image and vector field are received. By analysis on the pressure gradient and stress and velocity field the law of coupled 3D chain impact is gained. Through the entity model test analysis it is shownd that three-dimensional numerical simulation and experimental results are in good agreement with experiment.