| WANG Zhongtao,LI Xinzhong,LIU Peng,TAO Yanqi.Numerical analysis of submarine landslides using a smoothed particle hydrodynamics depth integral model[J].Acta Oceanologica Sinica,2016,35(5):134-140 |
| 基于SPH深度积分模型的海底滑坡数值分析 |
| Numerical analysis of submarine landslides using a smoothed particle hydrodynamics depth integral model |
| 投稿时间：2015-04-29 修订日期：2015-08-14 |
| DOI：10.1007/s13131-016-0864-3 |
| 中文关键词: 滑移速度 滑移距离 SPH深度积分法 摩擦流变模型 侵蚀效应 |
| 英文关键词:sliding velocity runout distance smoothed particle hydrodynamics depth integral method frictional rheological model erosion effect |
| 基金项目:The Specialized Research Fund for the Doctoral Program of Higher Education under contract No. 20120041130002; the National Key Project of Science and Technology under contract No. 2011ZX 05056-001-02; the Fundamental Research Funds for the Central Universities under contract No. DUT14ZD220. |
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| 中文摘要: |
| 海底滑坡会对海洋工程结构物造成严重破坏。滑移速度和距离是量化和分析海底滑坡的两个重要参数。目前BING等计算方法在模拟水下土体流动方面存在局限性,因此通过建立考虑土体固结和侵蚀效应的控制方程,选用摩擦流变模型,采用SPH深度积分算法,对海底滑坡进行了模拟研究。对比不同水深、坡度、接触摩擦系数和侵蚀率条件下的滑移体的速度、高度、长度的时程曲线,整理了最大滑移距离和速度,讨论变化规律。研究成果可为海底滑坡灾害预警和海底管线路由选址提供技术参考。 |
| 英文摘要: |
| Submarine landslides can cause severe damage to marine engineering structures. Their sliding velocity and runout distance are two major parameters for quantifying and analyzing the risk of submarine landslides. Currently, commercial calculation programs such as BING have limitations in simulating underwater soil movements. All of these processes can be consistently simulated through a smoothed particle hydrodynamics (SPH) depth integrated model. The basis of the model is a control equation that was developed to take into account the effects of soil consolidation and erosion. In this work, the frictional rheological mode has been used to perform a simulation study of submarine landslides. Time-history curves of the sliding body's velocity, height, and length under various conditions of water depth, slope gradient, contact friction coefficient, and erosion rate are compared; the maximum sliding distance and velocity are calculated; and patterns of variation are discussed. The findings of this study can provide a reference for disaster warnings and pipeline route selection. |
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