由于结构物贯入时网格变形过大而产生扭曲畸变等问题，常会造成岩土工程下沉贯入领域的数值分析收敛困难甚至计算结果失真。采用合适的数值方法分析此类问题颇具挑战性。传统的有限元模拟方法往往会出现收敛困难、作出不合理的假设以及需要依赖用户的专业网格重划分和插值程序等问题。耦合的欧拉-拉格朗日（CEL）分析方法结合了拉格朗日网格与欧拉网格的优点，可以有效地解决有关大变形和材料破坏等诸多问题。通过位移控制法和力控制法两种下沉方式，进行桶形基础室内液压下沉模型试验，得出不同强度的黏土中桶形基础下沉阻力和下沉深度的关系及土塞高度。应用CEL有限元法进行模拟，计算结果与试验结果较为符合。采用的CEL有限元模拟方法不仅可对桶形基础自重下沉和液压下沉进行预测，也可为其他海洋基础结构的贯入模拟提供有益参考。

Earth penetration in geotechnical engineering is difficult to model, due to its transient, coupled nature of the impact event. The interaction between the penetrator and the target is inherently coupled due to the vastly different material response. It is a challenging subject to simulate such problems properly. The traditional finite element method presents difficulties in convergence, unreasonable assumptions and professional interpolation routines. Nevertheless, the coupled Eulerian-Lagrangian method which combines the advantages of Lagrangian and Eulerian method can efficiently resolve the issue. Model tests are carried out to study the behavior of suction caisson jack installed in different types of consolidated soils. The penetration effect on the soil inside the caisson, i.e. soil plugs. is also investigated. The coupled Eulerian-Lagranginan (CEL) finite element method is performed to simulate the experiment process; the results are consistent with test data. The numerical simulating methods of penetration in geotechnical engineering discussed in this paper are accessible for those interested researchers.