shell element

This paper includes the degenerated shell finite element, which degenerates from solid element and is appropriate for moderate thick shell, and the parallel algorithm.

本文基于三维实体退化而来的退化壳元，开展中厚板壳有限元方法及其并行算法研究。

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Based on rate-form virtual work principe, Mindlin shell element and hypothesis that material volume is incompressible in plastic deformation, elasto-plastic finite element of large deformation is introduced into sheet metal forming process, and a contact and friction model is proposed.

利用率形式的虚功原理和考虑弯曲影响的Mindlin曲壳单元，根据塑性变形体积不可压缩的假设，将大变形弹塑性有限元应用于板料成形过程中，建立了接触摩擦模型。

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A 20 DOF hybrid stress element based upon Mindlin plate theory is developed by using the optimization design method for thin and moderately thick shell.

文章把杂交元的优化设计原理用于厚薄壳问题，构造了正交曲线坐标系中的Mindlin型四节点二十自由度壳元。

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In this paper, the static shape control of the flexible intelligent thin shell structure is derived by the intelligent thin shell element of Ref. [ 5]. Finally, a numerical example of a paraboloid antenna is given.

应用文献[5]给出的三维智能薄壳单元研究了柔性薄壳智能结构的静态形状控制问题，给出了抛物面形天线的静态形状控制算例。

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A kind of three layered 32-node temperature shell element is presented for the transient temperature field FEM analysis of the honeycomb sandwich composite shell.

提出一种三层32结点温度壳单元，对蜂窝夹芯复合材料壳体的瞬态温度场进行了有限元分析。

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The feasibility of area coordinate quadrilateral thin shell element is elaborated, which improve analysis precision and efficiency of sheet metal forming. And the detail formulation is evolved.

论证了在动力显式有限元算法中应用面积坐标四边形单元模型的可行性，从而有效提高成形分析效率和精度。

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In this paper, the tangent stiffness matrix, including load stiffness matrix, of a thin shell element with large defleCtions is derived, and the equilibrium path tracing method is introduced.

本文简要推导了包括荷载刚度矩阵在内的大变形等参数薄壳单元的切线刚度矩阵，并介绍了平衡路径的跟踪方法。

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Generalized Conforming Flat Rectangular Thin Shell Element

广义协调平板型矩形壳元

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A new axisymmetric curved shell element for thin/ thick shell

一种薄壳厚壳通用的轴对称曲壳单元

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Then two schemes are presented to reduce the false stress in a transition element connecting an axisymmetric solid element to an axisymmetric thin shell element for axisymmetric stress analysis.

方案一是在采用体元应力应变模型的基础上提出了一种单元内位移、应变及应力的直接修改方法；

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Reduced integrated quadratic shell element S 8 R 5 can provide accurate solution for small strain membrane bending problem.

减缩积分二次单元S8R5对于小应变薄膜弯曲问题的模拟能给出精确解.

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In this paper, based on the tentative design of design department, using space beam element and plate and shell element, the finite element model of aqueduct is built. Aqueduct of Ming-he in the middle of the engineering is analyzed by ANSYS finite element program.

根据设计部门提供的设计方案，本文采用空间梁单元、板壳单元建立渡槽结构的有限元模型，利用ANSYS程序，对南水北调中线工程的洺河渡槽进行分析研究。

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Then, theory of nonlinear finite plate and shell element method are made clear.

接着，阐述了板壳问题的有限元原理，系统介绍了非线性有限元理论。

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Then with the guiding theory of the static-geometric analogy, a new methodology of thin shell element is presented. context is given and static;

平面弹性和板弯曲的相似性是壳体静力几何比拟的特例，所以在总的意义下本文就是研究基于板壳静力几何比拟理论的新型板壳单元列式。语境是事先存在的、静态的；

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An Elasto-Plastic Analysis of Thick Shell Structures by Semi-Analytical Finite Element Method

厚壳结构弹塑性分析的半解析有限元解

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3-D finite element analysis is done for the static and dynamic characteristics of large-scale prestressed U-shaped thin shell aqueduct with shell element and 3-D isoparametric element adopted.

采用壳体单元和三维等参单元，对大型预应力U型薄壳渡槽静动力特性进行了三维有限元分析，给出了静力分析结果，并与模型试验作了对比。

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In the aspect of thin shell element, the ultimate aim is to construct the shell element which can perform well in both membrane-dominated and bending-dominated situations, yet so far no widely accepted guiding theory or practicable method has been found.

在薄壳单元方面，根本目标是构造在膜变形和弯曲变形分别占主导的壳体考题中都有良好表现的壳单元，但至今没有非常明确的指导理论和实施方案。

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The material modell of this shell element is an ideal plasticity.

该壳元的材料模型为理想塑性。

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New Shell Element for Arch Dam Stress Analysis

一种新板壳单元在拱坝应力分析中的应用

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A 3-dimensional finite element model of large size vacuum transfer line was developed by us of the shell element supplied in ANSYS. The natural frequency of the structure was obtained.

采用有限元程序ANSYS，选用壳单元，以大型减压转油线为研究对象，得出了转油线的结构固有频率；

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Finite cylinder shell element method for analysis of local stability of stiffener penstock

加劲环式压力钢管局部稳定性分析的有限柱壳单元法

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Thick Shell Element Method of Stress Analysis of Propeller Blades

螺旋桨桨叶固有动力特性方法研究螺旋桨强度的厚壳元分析

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Finite Element Analysis and Optimization of the Drawing Process of Head With Thick Semi-Spherical Shell

半球形厚壁封头冲压成形有限元分析及优化

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The reason for generating the false stress in a transition element connecting a solid element to a thin shell element for stress analysis is considered.

分析了体&壳过渡元中产生“虚假应力”现象的根本原因，给出了两种改进方法。

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Based on research achievements in some documentaries, with reference to calculating result of thick shell curve elements, an evaluation to 3-D solid element numeric analog simulation performance of 3 different displacement modes is carried out so to provide reference to space stress analysis for curve girders.

以一些文献的研究成果为依据，并以厚壳曲面单元的计算结果作参考，对3种不同位移模式的三维实体单元数值模拟性能进行评价，为曲线梁的空间受力分析提供参考。

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The abundance of H and heavy element in H-burning shell and neutron density and heavy element in He-burning shell are all reduced, but the abundance of the He is increased;

氢壳层内部氢和重元素及氦壳层内的中子数和重元素的丰度偏低，而氦元素丰度偏高；

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A formula for calculating steel deck deflection under construction is obtained by using shell element, and this avoids a complex operation of effective width for thin-walled section.

通过对施工阶段的压型钢板进行整体建模分析，提出了施工阶段压型钢板的挠度实用计算公式，避开了求解有效宽度的繁复运算；

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A 4-Node, 24 Degree of freedom thin flat shell element based on the membrane-plate similarity theory

一个基于膜板比拟理论的四节点二十四自由度的平板壳单元

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To build the finite element model, plastic shell element is used, materials nonlinearity and geometric large deformation are considered. The screws connecting sheathing and frame are modeled through coupling methods.

在建立有限元模型时，采用了塑性壳单元，考虑了材料非线性和几何非线性影响，自攻螺钉连接采用耦合模型。

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The optimal shape control of flexible intelligent thin shell structure is derived by using the intelligent thin shell element presented.

利用三维智能薄壳单元，研究了柔性薄壳智能结构的动态最优形状控制；

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