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Finite element model with imposed slip surfaces for earth mass safety evaluation

Journal of Central South University 2014年第9期21卷 3627-3638页

作者： nuno araujo Gaspar J.MACHADO Julio B.MARTINS Hugo M.R.D.SILVA C-TAC Territory Environment and Construction Research Centre School of EngineeringUniversity of Minho Guimaraes 4800-058 Portugal Centre of Mathematics School of Sciences University of Minho Guimaraes 4800-058 Portugal

The study of earth masses requires numerical methods that provide the quantification of the safety factor without requiring detrimental assumptions. For that, equilibrium analysis can perform fast computations but require assumptions that limit its potentiality. Limit analysis does not require detrimental assumptions but are numerically demanding. This work provides a new approach that combines the advantage of both the equilibrium method and the limit analysis. The defined hybrid model allows probabilistic analysis and optimization approaches without the assumption of interslice forces. It is compared with a published case and used to perform probabilistic studies in both a homogeneous and a layered foundation. Analyses show that the shape of the density probability functions is highly relevant when computing the probability of failure, and soil elasticity hardly affects the safety of factor of the earth mass.

关键词： slope stability probabilistic methods reliability genetic algorithms safety factor

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Dynamical Demixing of a Binary Mixture Under Sedimentation

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Communications in Computational Physics 2023年第1期33卷 1-21页

作者： Andre S.Nunes Rodrigo C.V.Coelho Vasco C.Braz Margarida M.Telo da Gama nuno A.M.araujo Centro de F´ısica Te´orica e Computacional Faculdade de CiˆenciasUniversidade de LisboaP-1749-016 LisboaPortugal Departamento de F´ısica Faculdade de CienciasUniversidade de LisboaP-1749-016 LisboaPortugal Electric Ant Lab Science Park 1061098 XGAmsterdamThe Netherlands

We investigate the sedimentation dynamics of a binary mixture,the species of which differ by their Stokes coefficients but are identical *** analyze the sedimentation dynamics and the morphology of the final deposits using Brownian dynamics simulations for mixtures with a range of sedimentation velocities of both *** addition,we use the lattice Boltzmann method to study hydrodynamic *** found a threshold in the difference of the sedimentation velocities above which the species in the final deposit are *** degree of segregation increases with the difference in the Stokes coefficients or the sedimentation velocities above the *** propose a simple analytical model that captures the main features of the simulated deposits.

关键词： Sedimentation Brownian dynamics lattice Boltzmann method

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