For portal frame light steel structure building , it has been widely used with less consumption of steel and has obvious advantage on the period and applicability of the construction with comparison to the tradition 在轻型房屋钢结构体系中，门式刚架结构在施工周期、结构适用性上与传统建筑产品相比，具备明显的优势。
This thesis analysis and summarizes the domestic and international researchers ’ work about shape optimization , and then concentrates on the research on spacial frame optimization design considering geometric nonlinear 本文在分析和总结了当前国内外结构形状优化研究工作的基础上,针对考虑几何非线性的空间刚架结构形状优化设计开展研究。
In this paper , according to the basic concepts of both moment distribution method and shearing force distribution , the frame deformation is divided into two parts : active one and passive one when internal force of frame structure is analyzed 摘要依据弯矩分配法和剪力分配法中的基本概念，在进行刚架结构内力分析时，将刚架变形分为主动变形和被动变形。
Based on displacement harmonization , we deduce a dummy stiffness element to simulate the excursion connection between spacial frame element , which simulates the actual structure more precise . compile a program of spacial frame optimization design 基于位移协调,提出了一种虚拟刚度单元,模拟空间刚架结构梁单元之间的偏移搭接问题,从而能更加准确地模拟实际的结构。
The shell is divided into orthogonal or oblique crossing girder systems , which make up a space rigid frame structure , then an analysis is made of the endogen force of the shell structure based on the curved lever space rigid frame structure 该方法通过将壳体结构离散成相互垂直或斜交的曲杆梁系组成的空间刚架结构，进而分析曲杆空间刚架结构的内力，达到壳体内力分析的目的。
Many scholars have done extensive research on spacial frame optimization design . but these studies are almost based on the theory of limited flexibility in small deformation linear elasticity theory , without considering the structure of the nonlinear element 对于空间刚架结构形状优化问题,许多学者都进行了广泛的研究,但研究内容几乎都是基于小变形线弹性理论的有限元法,而未考虑结构的非线性因素。
And use this optimization program computate the boom structure shape of heavy bucket - wheel stacker & reclaimer ; based on shape optimization , we use second optimization technology to optimize structure section size . the optimization results are satisfied . the computation indicates that considering the geometric nonlinear element can enhance the calculation efficiency and precision of optimization design evidently in sensitivity analysis 编制了空间刚架结构优化设计程序( 3dfem - opt . for ) ,并利用编制的优化程序对某大型斗轮堆/取料机前臂架在最大应力约束条件下,进行结构形状优化设计;在形状优化的基础上,采用二次优化技术,对结构的截面尺寸进行了优化。
Stress which three portal frames of dairy housing bore under different conditions was analyzed and relations between different post distance , roof gradient and structure internal force capability and steel dosage were obtained . at the same time , the structural section was optimized with float stress exponent method to lower steel dosage 通过程序，对牛舍三种门式刚架结构在不同工况下进行了应力分析，分析了不同柱距、屋面坡度与结构受力及结构用钢量的关系，并用准则法中的浮动应力指数法对优选出的结构进行了截面优化，达到了降低结构用钢量的目标。
This thesis deduces computational formulations of displacement sensitivity and stress sensitivity in structural shape optimization considering geometric nonlinear element . in the calculation of stress sensitivity , the modules required to cut the stiffness matrix of node coordinates few . in order to simplify calculation and make program conveniently , this thesis uses half - parser method 在空间刚架结构的形状优化设计中,关键的一项工作就是计算应力灵敏度,在计算应力对刚架结构形状优化的设计变量? ?结点坐标的灵敏度时,需用到单元刚度矩阵对结点坐标的导数。
