| 1. | Programming of isoperimetric quadrilateral element based on matlab
的四结点等参元的编程 |
| 2. | The principal laws of elastic and elasto - plastic materials are presented . formulation of 2 - d isoparametric quadrilateral element is done for finite element analysis
为了进行有限元分析选用了平面四结点四边形等参数单元，作出了相应的公式推导。 |
| 3. | The finite - element model utilized in this study is composed of 3d four - node shell ; both monotonic loading and cyclic loading are used for analyses
本文通过三维四结点壳单元建立了梁?柱节点的有限元模型，有限元分析包含了单向和反复加载两种情况。 |
| 4. | In the model , components of upper frame structures , such as beams and columns , are simulated with plane 4 - node quadrilateral parametric elements , and soils with plane 4 - node quadrilateral parametric elements
模型中采用平面四结点等参数单元模拟上部框架结构的梁柱构件。 |
| 5. | Based on 4 - nodes quadrilateral mixed interpolation shell element and total lagrange formulations , elastic - plastic finite element analysis was made for the mechanical behavior of circular radial slotted plane rupture discs
摘要基于t . l .列式，采用四边形四结点混合壳元对平板透缝爆破片的力学响应进行了弹塑性有限元分析。 |
| 6. | The lateral boundary nodes of the foundation finite element mesh are tied together and the side of and the bottom of the model is imposed with transmitting boundary so that the dynamic interaction between structures and foundations can be fully taken into consideration
地基采用平面应变四结点等参单元离散，在地基有限网格中设置底部及侧面透射边界和侧面捆绑边界以考虑结构?地基的相互作用。 |
| 7. | Second , a finite element program with four nodes - rectangle element is coded . a one - dimensional problem is analyzed with this program , and in turn , the creep and stress relaxation behaviors of articular cartilage under confined compression are numerically simulated
其次，编制了四结点四边形单元有限元程序，分析了一维多孔柱体算例，并进而对关节软骨围限压缩的蠕变和应力松弛行为进行了数值模拟。 |
| 8. | In order to overcome the drawback of classical fixed boundary models , a finite element model of structure - foundation system has been suggested in this paper for the earthquake response analysis of frame structures , such as beams and columns , are described with plane - stress 4 - node quadrilateral parametric element , and foundations with plane - strain 4 - node quadrilateral parametric element
为了正确处理结构?地基动力相互作用，改善以往固定边界模型将地震能量全部陷入结构计算模型的不合理状况，以框架结构为例提出了建筑结构地震反应分析的有限元模型及透射边界，模型中采用四结点平面应力等参单元模拟上部框架结构的梁柱构件。 |
