Abstract : water stops were used in caissons forming the dock walls and the caissons were of special structural shapes with various types , resulting in complicated technological process and sequence of work 文摘:中远船坞工程坞墙沉箱设有止水带，而且该工程沉箱结构形状特殊，型号变化多，工艺、工序复杂。
Analyze structures of parts to map , select representation methods and complete sketches . measure and obtain dimensions of the parts , compile necessary technical requirements and complete detail drawings 分析需测绘的零件结构形状，选定表达方案,画出零件的草图，测量并标注尺寸,编写必要的技术要求，绘制正规零件图。
The development of shape optimization module on msc . patran is implemented on the base of pcl language . furthermore , the function of shape optimization for two - dimension continuum structures is augmented 本文使用msc . pcl语言在msc . patran & nastran平台上实现了优化模块的二次开发，增加了二维连续体结构形状优化的功能。
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。
Furthermore , because of the unique shape of grab and the main frame apply to it , it ' s difficult to calculate the strain of grab with normal linear methods . during the design of grab , the design of holder is the main mission of whole design 在抓斗斗体的设计中，由于斗底板是整个斗体的主要部分，并且斗底板的结构形状特殊，所以就更加难以用测试或者计算的方法来求得斗底板的应力。
The optimization results of three simple examples and wing of global hawk show that this method has good generalization and has the ability to find good optimal solutions and it can be used in mdo conveniently , so it has great practical value in engineering design 三个简单算例以及全球鹰机翼结构形状优化结果表明这种方法思路清晰，通用性较好，并具有较好的优化效果，适合用在mdo中。
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。
Rice mill shaft as the important component of the machine , have some original not dynamic balancing on its complicated structure . it leads to the machine become more vibration , yawp , abrasion , shortening parts " life and low precision 碾米机主轴部分是碾米机械的关键部件，其结构形状比较复杂，存在多处原始的动不平衡因素，正是由于这种动不平衡造成了碾米机的振动加剧、噪声增加、成米精度差，而且还加剧了零件的磨损，降低了产品的使用寿命。
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。
Based on productional level and capability demand of hybrid electrical vehicles in our country , this paper designed a flywheel through analyseing and calculateing of different composite materials and shapes . through a finite element analysis method , the limiting rotational speed of composite flywheel was calculated and critical rotational speed was analyzed 本文根据混合动力客车对飞轮电池中飞轮的性能要求以及国内的生产实际水平，在对多种不同复合材料组合和不同结构形状的飞轮进行计算分析的基础上，得到一种飞轮设计，并计算了它的极限转速和临界转速。
