Applying discrete element method,taking flow-solid coupling into consideration,through setting different boundary water pressure,the paper studies penetration and scouring phenomena occurring homogeneous non-viscous earth dam break process. Results show that:when the boundary water pressure is smaller,the dam break is mainly caused by surface scouring,with the boundary water pressure increasing,the dam break is mainly caused by penetration and overtopping water flow.%利用离散单元法，并考虑流固耦合作用，通过设定不同的边界水压力，研究了均质无黏性土坝溃坝过程中的渗流和冲刷现象，结果表明：当边界水压力较小时，溃坝主要由表面流冲刷引起；随着边界水压力增大，溃坝同时由渗流和漫顶两部分水流引起。
展开▼
