摘要：应用两场交叉迭代解耦技术,建立了应力-渗流相互作用的无单元耦合分析计算模型。详细分析了东方红重力坝在不计应力-渗流耦合和考虑应力-渗流耦合两种情况下,正常蓄水时坝体的位移、应力和渗流位势分布的变化规律。分析表明,考虑耦合作用后,坝体的位移略小,但分布规律一致;坝体的水平正应力分布不同,垂直正应力变化较大,但分布规律一致;耦合作用条件下渗流对重力坝坝体应力的影响是不利的。计算成果符合一般规律。

摘要：Meshless method is a type of promising numerical approach. But for the method, the convergence is still lack of common theoretical explanations, and the technique of numerical implementation also remains to be improved. It is worth noting that a kind of uniformly defined intervention point is used in many existing schemes. Therefore, the intervention-point principle is proposed. The viewpoint is likely to give a reasonable explanation for the inaccuracy and instability of the collocation method. Based on the principle, a design process for a new scheme was demonstrated. Some initial numerical tests were also offered. The results have revealed the intervention point to take effect on convergence, suggested a construction concept using intervention point for meshless collocation method, and presented a new scheme of meshless method for application.

摘要：流形方法是目前土木工程比较关注的一种新的数值方法。从流形方法的二种发展思路(一种把有限单元法和不连续变形分析融入流形方法;另一种是把无单元法引入流形方法)出发分别对其进行综述,介绍其研究成果和应用进展,并提出几点浅略的看法。

摘要：编制了高承台群桩的非线性无单元法的计算程序,通过调整倾斜荷载的方向分析研究了群桩的弯矩,并寻找其与荷载的关系,以求为工程应用提供相关建议。

摘要：坝坡浸润线是尾矿坝的生命线,它是直接影响坝体安全的一个非常重要的因素。将无单元Galerkin法应用于尾矿坝渗流场及坝体内自由面的模拟计算。详细介绍了无单元Galerkin法的基本理论、边界条件处理方法和自由面处理方法等。在此基础上采用IDL语言编制了二维无单元法的可视化计算软件EFM。最后以风水沟尾矿坝为例,采用无单元法计算了该尾矿坝渗流场分布,并和有限元计算结果进行了对比分析。计算结果表明,采用无单元法可以很好模拟有自由面的尾矿坝渗流场分布,为尾矿库的安全生产与管理提供一定的科学依据。