| 1. | At the same time , the computing program is written by vc + + . in the program quadrilateral isoparametric element is used to calculate its temperature field and thermal stress field
选取四边形等参元来计算轴对称问题中的温度场和热应力场，用vc + +编制计算程序。 |
| 2. | And compared with the quadrangular isoparametric element , the manifold element ( t1 - 0 ) can give more accurate initial pore pressure and displacement and have a vast prospect of application
与等价四边形等参元相比， t1 - 0流形元能给出精度更高的初期孔压和位移。 |
| 3. | By using 3 - d isoparametric element , the global stiffness matrix equation for the piezoelectric laminate is obtained on the bases of minimum principle of total potential energy
由于最小势能原理，建立了单元刚度矩阵和压电材料的整体刚度方程。并且推导了压电层合板的边界条件。 |
| 4. | Secondly , the dissertation summarizes the fundamental principle of finite element analysis on conduit subway , introduces the main calculation formula for finite element analysis , and then it develops reinforced concrete finite element calculation computer program which includes quadrilateral 8 nodes isoparametric element and one - dimensional 3 nodes isoparametric element
2 、阐述了地下埋管有限元分析的原理、方法和步骤，给出了有限元分析的主要计算公式，并编制了包含四边形8结点等参单元和一维3结点等参单元的钢筋混凝土管道有限元计算程序。 |
| 5. | In the beginning of this thesis , types and characteristics of intelligent material elements have been introduced . and the basic equations of piezoelectric material have been given . then according to hamilton principle , both the static and dynamic finite element equations for the intelligent structure are formulated with isoparametric element of bending plate or bending beam
在本论文的开始，简要介绍了智能材料元件的种类和性质，并给出了压电材料的本构方程，然后根据hamilton原理，采用任意等参四边形板梁弯曲单元，导出了智能梁的静态、动态有限元方程；对于复杂几何形状或边界条件的一般结构，根据三维有限元模型，导出三维动态有限元方程。 |
| 6. | For having a directly perception to the influence of interaction , the author completes program of calculating huge structure ' s dynamic properties which worked out by fortran language , and employ 3d incompatible isoparametric element figures out the dam properties in the condition of rigid foundation meantime . further the author calculates dynamic displacement of dam in software of matlab , ansys
为了对动力相互作用影响有一个直观的认识，作者完成了fortran语言编制的计算大型结构动力特性程序，并采用三维8结点非协调等参单元分析了坝体在刚性地基情况下的动力特性，并在matlab 、 ansys中计算了坝体的动位移时程曲线。 |
| 7. | In this dissertation , the principle of fem in em was discussed , then the pulse radar and three - layered pavements were analyzed with 20 - noded and 4 - noded isoparametric elements respectively . then , corresponding fem programs are compiled in fortran90 . so a forward model was built up to describe the transmitting of electromagnetic in the radar and pavements , according to the system identification method
针对上述情况，本文系统阐述了电磁场有限单元法的基本原理，然后采用二十节点、四节点等参单元分别对pulse雷达实体及三层路面系统进行了静态场和时变场的有限元分析，初步建立了电磁波在三层路面中传播的正演模型，同实测波形相比，模拟效果较好，并用fortran90语言编制了相应的三维、二维有限元程序，具有较好的可读性和可移植性。 |
| 8. | Theoretical research based on the quasi - static test such as theoretical analysis in nonlinear finite element method , programs to shape function of isoparametric element of hexahedron with eight nodes and to stiff matrix of elements , application of resilience model in degeneration equation of elastic module of concrete goes along
在试验基础上进行了理论研究，用非线性有限元方法分析框架，编写了六面体八节点等参元形函数、单元刚度矩阵等部分程序，将恢复力模型应用到混凝土弹性模量退化方程中。 |
