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我国西部地区泥石流活动频繁,对建筑物的破坏以及人们生活带来了极大的影响。有效模拟泥石流冲击作用下结构的响应,可为研究建筑物抵抗泥石流冲击奠定基础。基于流-固耦合的基本理论,运用工程数值模拟软件ANSYS Workbench对设计的新型楔挡分流结构在泥石流冲击作用下的动力响应进行了数值模拟,并利用流体分析软件CFX对黏性泥石流流场进行了模拟,得到了泥石流速度场及压力场的大小及分布。研究表明:楔挡分流结构的楔挡角度越大,结构所受应力就越大,容易破坏。综合流速和角度的关系,得到60°的楔挡分流结构综合拦挡分流效果最佳,该结果可供泥石流拦挡工程的设计参考。
The frequent activities of debris flow in western China have brought great impact on the destruction of buildings and people’s life. Effectively simulating the response of the structure under the impact of debris flow can lay a foundation for studying the impact of buildings against debris flow. Based on the basic theory of flow-solid coupling, the dynamic response of the new wedge-block diversion structure designed by the debris flow impact is simulated by the engineering numerical simulation software ANSYS Workbench. The flow field of the viscous debris flow is analyzed by fluid analysis software CFX After simulation, the size and distribution of velocity field and pressure field of debris flow were obtained. The research shows that the greater the wedging angle of the wedge block shunt structure, the greater the stress to the structure and easy to damage. According to the relationship between flow velocity and angle, the integrated shunting effect of wedge block shunt structure with 60 ° is the best, which can be used as a reference for design of debris flow blockade project.