Modeling and numerical simulation of landslide dynamics

地球上的某些地形受到天然或人工山坡突然发生的山体滑坡的威胁。滑坡造成的损害在人的生命和经济损失方面可能是巨大的。因此，对当前和未来人口密集地区的滑坡风险进行评估，需要对此类灾害进行可靠的预测，并开发有效的数学模型，以描述运动学滑坡的运动。现代数值解方法能够逼真地模拟所考虑的滑坡的动态行为和内部滑坡物质结构中的相关过程，该研究项目开发并证明了用于分析滑坡运动的连续数学和有限元数值模型。滑坡物质和自由表面流体以及基底地形之间的相互作用由所涉及的连续体的界面耦合公式来描述。界面质量和动量平衡方程用于耦合相互作用的连续体。可用的实验研究用于验证模型。

Selected topographies on earth are threatened by sudden landslides on natural or artificial hillsides. The damage caused by landslides can be significant in terms of human lives and economic losses. Therefore, the assessment of landslide-risks for today and future populated areas re- quires reliable prediction of such hazards and development of effective mathematical models in order to describe the motion of kinematic landslides. Modern numerical solution methods enable realistic simulations of the dynamic behaviour of the slide under consideration and related processes in the inner landslide-material structure.The research project develops and proves a continuum-based mathematical and a finite-element-based numerical model for the analysis of landslide motion. Interaction between the landslide-material and free-surface fluids as well as the basal topography is described by an inter- face-coupled formulation of the involved continua. The interfacial balance equations of mass and momentum are used to couple the interacting continua. Available experimental investigations are used for verification of the model.