Based on theory of big flexibility defective close columnar shell , use adding partition board to resolve the partial buckling problem in partially cfst arch bridge ' s hollow steel tube segment . the formula of how to confirm the space between partition boards was deduced to content whole and partial buckling 在大挠度有缺陷闭合圆柱壳体局部稳定理论基础上，提出采用增设横隔的办法以解决部分灌注钢管混凝土拱桥中空心钢管段的局部稳定问题，并导出了在同时满足钢管整体和局部稳定性的前提下，需增设横隔的间距的公式。
The side displacement of the glass plate center is larger or less than the glass plate thickness , for the 3d geometric size of the glass plate and the lateral load vary in a wide range . in other words , the mechanic analysis of glass plate belongs to large deflection or small deflection theory in thin plate theory 由于幕墙玻璃的三向几何尺寸和横向荷载集度可在较大的范围内变动，玻璃板中心的侧向位移，有可能小于或大于玻璃板的厚度，也就是说，幕墙玻璃的力学分析，既可能属于薄板理论中的小挠度问题，也可能属于大挠度问题。
As regards to the spheric thin shell structure under external hydro static pressure , basing on flat - plate theory and by using basic von karman equations for large deflection , the equilibrium problem of axisymmetric bending of the spheric shell under uniform external pressure is simplified to an equilibrium problem of bending of elastic basic flat - plate and further converted into an equilibrium problem of beam on elastic fundation taking into consideration of the deformation characteristics 对球形薄壳结构随静水外压的情况，应用平板理论中的vonkarman大挠度基本方程，将球形薄壳在均匀外压下的轴对称弯曲平衡问题简化为弹性基础平板的弯曲平衡问题，进而再根据变形特点将其转化为弹性基础梁的复杂弯曲平衡问题。
But method based on large deflection theory was proposed in this paper . accordingly , output force and displacement of each sma actuator under anticipative attitude was obtained as well as accurate coordinate of the center of the joint and deflection curve equation of the axis of the active catheter 基于大挠度理论对主动导管做了力学和运动学分析,相应获得了预期姿态下各个sma驱动器上的输出力和输出位移,以及精确的关节中心位置坐标和导管轴线挠度曲线的具体形式。
In - plane displacements of a typical suspension cable under the given vertical load are analyzed . the obtained numerical results are compared with the corresponding theoretical results and good agreement is found . this demonstrates the accuracy and validity of the proposed method 在理论推导的基础上先进行了悬索的大挠度静力分析，对一典型悬索在竖向荷载作用下的面内位移进行了实例数值计算，计算结果与解析方法得到的结果作了比较，验证了该方法的正确性和有效性。
Third , on the base of expatiating on experimental research method and theoretical research method of joints , the paper points out two kinds of valid methods , which are used to analyze the tube joints stress of dendriform structure by making use of semi - analytical method and inelastic large deflection finite element analysis method , confirms to apply the evaporative pattern casting process as the facture method of dendriform structure cast joints , and detailed dissertates the casting theory , casting process , generation cause and prevention measure of casting flaws , heat treatment method and inspection standard about cast steel joints 然后在阐述树状结构节点实验研究方法和理论研究方法的基础上，提出了利用半解析法和弹塑性大挠度有限元法两种有效分析树状结构管节点应力的方法，并给出两种方法的详细表达式及它们各自的优缺点。通过对铸钢件常见制作方法的介绍，确定了采用消失模法作为树状结构铸钢节点的制作方法，并详细论述了用消失模法制作铸钢节点的铸造原理、铸造工艺、铸造缺陷产生的原因及防治措施、铸钢节点的热处理方法以及检验标准。
Through discussion and comparison of some numerical results with the corresponding tested results , it demonstrates that the proposed finite volume method can accurately and effectively predict the static large - deflection deformation behavior and harmonically excited and wind - induced vibration behavior . the method is also of high computational efficiency 通过对计算结果进行分析，并将部分结果与实测结果进行比较可以发现，本文的数值方法能够较为准确有效地预测悬索的大挠度静态受力和变形特性，预测悬索的简谐激振、风振等动力响应，并具有较高的计算效率。
Both the effect of substrate deformation and the state of large deflection of the microbridge are involved in the theoretical expression . furthermore , the distribution of axial stress in the micro bridge is discussed in detail by taking different shapes of cross section into consideration . and a shape factor is introduced into the expression , which simplifies the theoretical expression 理论上对薄膜微桥法的公式进行了进一步的化简，在考虑衬底变形贡献和大挠度的基础上，进一步探讨了微机械加工过程中不同横截面形状的情形；并对矩形和梯形截面微桥的轴向应力分布作了分析，补充和发展了薄膜微桥法的理论；引入了横截面形状修正因子，简化了公式的表达和计算。
In this thesis a new numerical method - the finite volume method is developed to achieve the static and dynamic large - deflection response analysis for suspension cables . the finite - volume division scheme is first established along the length of the cable and the deformation of each volume is defined using the common engineering strain concept . based on this strain definition the strain energy of the cable is determined 首先建立了悬索沿索长方向的有限体积离散格式，在变形后的构形上按工程方法求得了应变，并进一步得到了应变能和动能的计算式；再根据哈密顿原理导出了悬索大挠度振动的有限体积离散方程，推出了索的整体节点力向量、质量矩阵和切线刚度矩阵。
