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| Numerical study on failure process of accropode under the impact of uniform flow |
| Received:October 08, 2012 Revised:December 28, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201402018 |
| KeyWord:CDEM FVM combined contact model breakwater accropode failure mode |
| Author | Institution |
| 冯春 |
中国科学院 力学研究所, 北京 |
| 李世海 |
中国科学院 力学研究所, 北京 |
| 赵颖 |
中国科学院 力学研究所, 北京 |
| 刘晓宇 |
中国科学院 力学研究所, 北京 |
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| Abstract: |
| Accropode is considered as an important breakwater armour block,and the failure process is closely related to impact force of flow.Based on Continuum-based Discrete Element Method (CDEM),and by introducing FVM algorithm and semi-spring & semi-edge combined contact model,the precise calculation of element deformation and quick update of element contact under large displacement are realized.According to modified CDEM above mentioned,and by applying gradually increased dynamic face force on accropode surface with the direction of flow,the numerical simulations are taken.The crack process of single accropode and instability process of accropodes group under impact load of uniform flow are studied.Numerical results show that,the main crack mode of single accropode is root fracture,with the crack velocity 20~24 m/s in different impact direction; and the main instability mode of accropodes group is single accropode jumping out of group,with the instability velocity 4~12 m/s in different tonnage. |
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