| 1. | Programming of isoperimetric quadrilateral element based on matlab
的四结点等参元的编程 |
| 2. | Study on design method for normal helicoid blanks based on spatial quadrilateral elements
基于空间四边形单元的正螺旋面下料图设计方法 |
| 3. | It is enough to construct , the shape function on the k . but for arbitrary quadrilateral elements , the situation is different
)上构造形函数。而对任意四边形元，情况就大不一样了。一方面，要在参考元( |
| 4. | 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。 |
| 5. | In this paper , 8 - node isoparametric quadrilateral element is used to divide the soil and retaining structure . comparing to practical engineering , the numerical method - finite element method is used to analyze every behavior of deep foundation excavating and retaining in loess area
本文采用八结点四边形等参元来离散土体与围护结构，用有限元数值方法，对照实际工程，对黄土地区深基坑开挖与支护体系的各种性状进行了分析。 |
| 6. | To improve computing precision , the latter applies interpolating function of curved - quadrilateral element containing six npdes to thicking the influence surface of grillage . compared with lagrangian interpolation for rectangular element and triangle plane interpolation , this way not only improves computing precision but be more suitable for the curved - bar grillage analyzing method introduced this paper
为了提高计算精度，本文应用六结点曲边四边形单元插值函数加密梁格影响面，与矩形单元拉格朗日插值及三角平面插值方法相比，不但提高了计算精度，且更适于曲杆梁格分析。 |
| 7. | The model adopts eight - nodes isoparametric quadrilateral element , drucker - prager ideal elastic - plastic stress - strain model and the contact element , which is used to simulate the interface between the wall and soil . accordingly , a flow chart about the arithmetic of contact is introduced in this paper
模型采用八结点等参平面四边形单元、 drucker - prager理想弹塑性本构模型以及用接触面单元模拟了土与围护结构的相互作用，并给出了相应的接触面模拟的接触算法流程。 |
| 8. | An original mesh generation method based on the nc track points of tool surfaces is proposed here , the method can automatically generate meshes consisting of only quadrilateral elements , which is desirable for better accuracy and efficiency of simulation . besides , an automatic local coarsening algorithm for structured quadrilateral meshes is also developed . for arbitrary discrete points on auto body surfaces , an automatic triangulation method is adopted and a series of mesh optimization methods with given constraint conditions are proposed
创新地提出了基于模具型腔表面nc数控轨迹点的全自动四边形网格生成算法，提出了结构化四边形网格局部自动优化算法，研究了基于车身曲面离散点的三角形网格自动生成算法，并提出了给定约束条件的三角形优化算法，探讨性地研究了基于模具曲率半径的板料初始网格局部自动细化算法。 |
| 9. | The explicit finite element method ( fem ) based on the varying time - step was selected to analyse the dynamic roll - pass process ; the nodes on the leading face of the steady - state elements set was extracted and projected onto a plane to give the required mesh , also called the origin mesh ; the implicit fem was selected to analyses the inter - pass transient thermal process ; a geometric part from the mesh was generated and meshed by using the quadrilateral elements , a heat transfer analysis was selected to transfer the node temperature data ; a new model was created by using hexahedral elements , mapping the node temperature and the equivalent plastic strain on the integration points
利用基于变步长中心差分格式的显式积分方法分析瞬态轧制过程；提取稳态单元集节点形成截面网格；利用隐式积分方法分析轧制道次间隙瞬态温度场；对型钢断面进行平面四边形网格划分并映射节点温度数据；利用六面体单元构建有限元分析模型，映射单元节点的温度、积分点的等效塑性应变，进行数值分析。 |
