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| Coupled DEM-SPH simulations of rock dumping in waters for pipeline reinforcement process |
| Received:November 09, 2020 Revised:January 16, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201109001 |
| KeyWord:DEM-SPH coupling discrete element method smoothed particle hydrodynamics dilated polyhedron rock dumping |
| Author | Institution |
| 刘圆 |
中国船级社海洋工程技术中心, 天津 |
| 张普然 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
| 刘璐 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
| 季顺迎 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| Rock dumping,including falling into the water and impacting on the pipeline,is a typical particle-fluid coupling system.The fluid-solid coupling model can be adopted to simulate the particle-fluid system,in which the discrete element method (DEM) is used to simulate the rocks and the weakly compressible smooth particle hydrodynamic method (SPH) is used to simulate the water.The irregularly shaped polyhedra are generated with the 3D Voronoi tessellation algorithm,where the dilated-polyhedron-shaped rocks can be generated according to the Minkowski sum theory.The repulsive force model in the SPH is employed to calculate the interaction between the dilated polyhedra and SPH particles.Accordingly,the DEM-SPH coupling method can be established.The dam break and free-falling of a wedge into water are simulated to validate the SPH and DEM-SPH coupling method.The discharge hopper and the submarine pipe are constructed by the cone-tube structure.The contact model between the dilated polyhedron and cone-tube structure is investigated by the simulation of the rocks free-falling from the discharge hopper into the cylindrical container.The rocks dumping into the water and interacting with the submarine pipe are simulated with the DEM-SPH coupling method.The interacting force on the pipe from the rocks and water is determined,while the rock accumulations are analyzed.The results indicate that the proposed DEM-SPH coupling method is an effective approach to simulate the interaction between granular material,water,and engineering structure,and can be further applied in the structure and parameter design of the rock dumping process. |
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