Physically based modeling and animation of landslides with MPM
Physically based modeling and animation of landslides with MPM
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使用 MPM 对山体滑坡进行基于物理的建模和动画
DOI：
10.1007/s00371-019-01709-3
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发表时间：
2019-06
期刊：
影响因子：
3.5
通讯作者：
Peng Qunsheng
中科院分区：
文献类型：
--
作者：
Zhao Jianwang;Chen Yi;Zhang Haitong;Xia Hao;Wang Zhangye;Peng Qunsheng
滑坡是一种可能导致重大人员伤亡以及阻断山区交通的灾害。在本文中，我们提出了一种新的基于物理的模型，用于在改进的物质点法（MPM）框架下模拟滑坡的动态流动。
Landslide is a disaster which may cause huge losses of human life and block the traffic on hilly area. In this paper, we present a new physically based model to simulate the dynamic flow of landslides, under a modified MPM (material point method) framework. To realistically simulate the characteristics of fracture and flow of soil medium in landslide, we introduce the modified Cambridge clay model (MCCM) from soil dynamics into the yield surface criterion to model the dynamic process of landslides. The interaction between soil and rock in the landslide is simulated by a level-set-based two-way fluid–solid coupling algorithm. Meanwhile, we propose a GPU-based optimization to calculate the signed distance function in level set to improve the efficiency of collision detection. We also simplify the hardening and softening parameter calculation algorithm of MCCM to reduce the calculation involved in landslide simulation. By choosing different values of the material yield surface parameters, various kinds of landslide disaster scenes with different cover area are successfully generated, including rocks rolling from hill, soil and rock collapsing, landslide flowing, and covering the road and cars. Experimental results demonstrate the potential of our method.
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DOI：
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