中文摘要：

为探究泥石流浆体与防治工程之间的耦合作用关系,将大型通用有限元软件集成平台ANSYS Workbench下的计算流体动力学分析软件CFX与结构静力分析模块Static Structural相结合,对泥石流灾害防治工程中广泛应用的重力式拦挡坝进行空库过流条件下的单向流固耦合分析,并且在分析过程中特别引入了水利水电工程拱坝体型设计中的柔度系数.结果表明,流动状态稳定后的泥石流浆体总压力符合液体压强沿深度方向上小下大的层状分布规律;外流场分析得到的泥石流冲击力与规范公式计算值十分接近,二者误差不超过5%;建议以流动状态稳定后的浆体动压力作为泥石流流体作用下的最不利荷载;如果重力式拦挡坝的柔度系数超过15,则在力学上属于平面应变问题.

英文摘要：

In order to explore coupling relationship of debris flow slurry to prevention works, a combination of computational fluid dynamics software CFX with structural static analysis module Static Structural in the large-scale general finite element software integration platform ANSYS Workbench was used to con- duct one-way fluid-solid coupling analysis of intercept gravity dam, which is generally utilized in preven- tion engineering of debris flow disaster, under condition of empty reservoir flow passing. The flexibility coefficient which was employed in shape design of arch dam in water conservancy and hydropower engi- neering was especially introduced into analysis process. The result indicates that total pressure of debris flow slurry will meet the depth-wise layered distribution pattern （top-lower, bottom-higher） of liquid pressure after flow becoming stable. The impact force of debris flow obtained with external flow field anal- ysis will be very close to the calculated value with normalized formula, and the deviation between them is less than 5 M. The slurry dynamic pressure of stabilized flow should be proposed as the most disadvanta- geous load on the dam under the action of debris flow. If flexibility coefficient of a gravity dam exceeds 15, there will be a plane strain problem in view of mechanics.