Application of a Coupled Eulerian-Lagrangian approach on geomechanical problems involving large deformations
Application of a Coupled Eulerian-Lagrangian approach on geomechanical problems involving large deformations
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DOI：
10.1016/j.compgeo.2010.09.002
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发表时间：
2011-01-01
影响因子：
5.3
通讯作者：
Grabe, Juergen
中科院分区：
文献类型：
--
作者：
Qiu, Gang;Henke, Sascha;Grabe, Juergen
岩土工程中的大变形边值问题往往难以用经典有限元法求解。由于大的变形，可能发生大的网格变形和接触问题，使得不能实现收敛解。自Abaqus 6.8版以来，一种新的耦合欧拉-拉格朗日（CEL）方法已经发展起来，以克服有限元法和大变形分析方面的困难。这种新方法的研究，就其能力。首先，一个基准测试，条形基础问题进行了研究，并比较分析解决方案和可比的有限元分析结果。该基准测试表明，CEL非常适合处理使用FEM不能完全解决的问题。在进一步的应用中，CEL方法被应用到更复杂的岩土边值问题。首先，模拟桩安装到地基土中。将桩顶入地面，并将这些分析的结果与经典有限元模拟的结果进行比较。第二个案例研究是模拟一艘搁浅在堤岸上的船。CEL模拟的结果进行了比较，在原位测量数据。最后，新的CEL方法的能力进行评估，其鲁棒性和效率。(C)2010爱思唯尔有限公司版权所有。
Geotechnical boundary value problems involving large deformations are often difficult to solve using the classical finite element method. Large mesh distortions and contact problems can occur due to the large deformations such that a convergent solution cannot be achieved. Since Abaqus, Version 6.8, a new Coupled Eulerian-Lagrangian (CEL) approach has been developed to overcome the difficulties with regard to finite element method and large deformation analyses. This new method is investigated regarding its capabilities. First, a benchmark test, a strip footing problem is investigated and compared to analytical solutions and results of comparable finite element analyses. This benchmark test shows that CEL is well suited to deal with problems which cannot be fully solved using FEM. In further applications the CEL approach is applied to more complex geotechnical boundary value problems. First, the installation of a pile into subsoil is simulated. The pile is jacked into the ground and the results received from these analyses are compared to results of classical finite element simulations. A second case study is the simulation of a ship running aground at an embankment. The results of the CEL simulation are compared to in situ measurement data. Finally, the capabilities of the new CEL approach are evaluated regarding its robustness and efficiency. (C) 2010 Elsevier Ltd. All rights reserved.