摘要：翻转管作为一种理想的防碰撞吸能元件在工程设计、航空航天等领域有着很广泛的应用.研究了由一类可压缩超弹性材料组成的薄壁圆柱管的翻转有限变形问题,并将其归结为求解一类二阶非线性常微分方程边值问题.由于无法得到该边值问题的解析解,并且传统的数值求解方法也不适用,提出一种改进的打靶法对其进行有效数值求解,并分析解的定量行为.数值结果显示翻转后圆柱管厚度和轴向伸长率随着初始厚度的增大而增大,且圆柱管处于压缩状态;轴向伸长率随着泊松比的增大而减小.此外,还与不可压缩材料的圆柱管翻转问题进行了对比.

摘要：应用解析几何和投影几何的理论，建立了二薄壁圆柱管相交时，在各种情况下展开的数学模型，并用Ａｕｔｏｌｉｓｐ语言设计出了绘制展开图的实用程序，将它应用在数控机床上。

摘要：本文应用解析几何与投影几何的理论，分析了三通薄壁圆柱管交线的特点后，建立了交线的函数式，并用Auto-lisp语言设计出了绘制柱管展开图的实用程序，将它应用在数控机床上，可快捷而精确地解决钣金加工中用各种各样薄板制成三通圆柱管的自动下料问题，在生产实践中，具有较高的实用价值．

摘要：本文介绍了一种连接两异交叉圆柱管之接头的优化设计方法，采用图解法推导了圆柱管与圆锥管相连接的简单几体关系及其计算公式，因而简化了这类管道接头的设计计算问题。

摘要：Carbon nanotube(CNT)/polymer nanocomposites have vast application in industry because of their light mass and high strength. In this work, a cylindrical tube which is made up of functionally graded(FG) PmP V/CNT nanocomposite, is optimally designed for the purpose of torque transmission. The main confining parameters of a rotating shaft in torque transmission process are mass of the shaft, critical speed of rotation and critical buckling torque. It is required to solve a multi-objective optimization problem(MOP) to consider these three targets simultaneously in the process of design. The three-objective optimization problem for this case is defined and solved using a hybrid method of FEM and modified non-dominated sorting genetic algorithm(NSGA-II), by coupling two softwares, MATLAB and ABAQUS. Optimization process provides a set of non-dominated optimal design vectors. Then, two methods, nearest to ideal point(NIP) and technique for ordering preferences by similarity to ideal solution(TOPSIS), are employed to choose trade-off optimum design vectors. Optimum parameters that are obtained from this work are compared with the results of previous studies for similar cylindrical tubes made from composite or a hybrid of aluminum and composite that more than 20% improvement is observed in all of the objective functions.

摘要：在引进工程中，难免要碰到因仪表设备和材料供货国家或厂商不同，而产生螺纹连接标准的问题。现就日、美、中三国在导压管线（包括仪表空气、蒸汽保温管线等）、电线保护管（包括穿线盒、接线箱、挠性软管等）螺纹匹配选用问题谈一些体会，同时提供了部分资料。