| 1. | 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。 |
| 2. | The main work carried out goes as following : ( 1 ) the stiffness matrix of the 8 - noded isoperimetric brick element with equivalent reinforcement membrane is carefully deduced
本文的主要工作如下： ( 1 )推导了带钢筋薄膜的八结点六面体等参数单元的单元刚度矩阵。 |
| 3. | 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。 |
| 4. | According to the fundamental equations of elastic and electric fields , total potential energy for the electro - elastic laminate under general boundary conditions is established
引入了压电材料的空间等参数单元，并且从弹性力学与电学基础上，根据三维有限元法，建立了压电材料的能量泛函。 |
| 5. | The introduction of these presuppositions are not real and may result in wrong resolutions by ignoring some dangerous situations . the present thesis attempts to implement a nonlinear fem analysis by using 8 - noded isoparametric brick element with equivalent reinforcement membrane
因此，本文尝试性地摒弃这些假定，运用带钢筋薄膜的八结点六面体等参数单元，以三维实体单元来对钢筋混凝土板进行了非线性有限元分析。 |
| 6. | Based on the fem program on fracture of plane structure developed by professor fu xiaoling of ho hai university , a two demension damage and fracture finite program package which is programed in fortran 90 language is developed . the paper adopts the plane - eight - nodes isoparameters element and compute the developing law of the damage and macro - damage of plane structure under load . considering the original damage and tension and compression damage at the same time , the paper adopts the more reasonable concrete constitute relation of two demension and exponent function model
在河海大学符晓陵副教授所编制的平面结构断裂有限元程序（ dl08p4 ）基础之上，本文用fortran90语言编制的二维损伤-断裂有限元程序包，程序采用平面八结点等参数单元分析计算平面结构在外荷载作用下损伤及宏观裂缝的发展规律，考虑了混凝土结构体内存在着初始损伤和同时存在的拉、压损伤，并且采用更为合理的具有损伤含义的混凝土二维本构关系（即正交异性损伤模型中的本构方程）和指数函数模型建立的并可进行拉、压损伤可比性换算的损伤演变方程，较为真实地反映了实际情况。 |
| 7. | In this paper , nonlinear behavior of reinforcement concrete combined torsion members subjected to axial compression , bending moment , shear and torsion is analyzed and researched with nonlinear finite element method . concrete has been modeled using eight - node hexahedral isoperimetric element and reinforcement element are divided into two cases . longitudinal reinforcement has been modeled with discrete element and stirrup has been modeled with smeared element
在建立钢筋混凝土的有限元模型时，混凝土采用的单元为八节点六面体等参单元，钢筋单元分为两种情况，纵向钢筋采用分离式钢筋单元，箍筋采用埋藏式钢筋单元，即箍筋作为附着在混凝土等参数单元内或单元上的“膜单元” 。 |
| 8. | In this paper , the load status for different shafts is analyzed after introducing their structures , and the several dynamic models are established under analyzing the status of load . the strength of the shafts is calculated with three - dimensional finite element method by ansys software . the mesh generation is automatic , and we use the method to generate 10 - node or 20 - node elements
本文在分析潜油电泵机组具体结构特点的基础上，对不同类型的轴类零件做了受力分析，根据分析需要建立了不同的力学模型，并应用三维等参数单元法对轴类零件进行了强度分析和计算。 |
