海洋石油平台水下夹桩器本体结构分析

水下夹桩器是一种广泛应用于海洋石油平台建设的液压夹具。水下夹桩器本体焊接在导管架上，支撑夹桩器液压缸。在水下夹桩器本体设计中，采用有限元法完成了对本体强度和刚度的结构分析；建立了有限元分析模型，用ANSYS软件进行结构分析，得到了分析结果，并将该结果与理论计算结果进行了比较，验证了有限元分析技术的有效性。设计结果满足工程要求，为改进和优化结构提供了理论依据，节省了分析计算时间。     

Design consideration of photocatalytic oxidation reactors using TiO2-coated foam nickels for degrading indoor gaseous formaldehyde

In the design process of the photocatalytic oxidation (PCO) reactor using TiO₂-coated foam nickels, the optimum of catalyst film thickness, light intensity and flow velocity were considered. A model was developed to study the effect of catalyst film thickness on photocatalytic degradation of formaldehyde by a TiO₂-coated foam nickel at continuous flow mode. In this model, external mass transfer and internal molecule diffusion-reaction were considered. A first-order kinetics equation was used to account for the photocatalytic reaction. Two exponential equations were employed to describe the distribution of light intensities in foam nickels and catalyst films, respectively. Validated with experimental data, the model can be used to predict the optimal thickness of catalyst films. A method for determining appropriate light intensities was proposed and discussed. The appropriate light intensity can be obtained by giving a margin, regarded as an excess coefficient, to the light intensity calculated based on the assumption of complete use of excited electron–hole pairs. The excess coefficient needs to be determined experimentally. In addition, the optimal flow velocity of PCO reactors could be consistent with the required one by changing the windward area of foam nickels. Based on the theoretical analyses, a novel PCO reactor containing 15 parallel-connected cells was designed. Each reaction cell was composed of an UV lamp and a TiO₂-coated tubular foam nickel. The performance of the reactor was tested by degrading gaseous formaldehyde at an indoor concentration level. The results showed that the reactor had low pressure loss and good degradation capability.     

冶金厂房钢吊车梁设计中一些问题的探讨

对双层翼缘板焊接工型钢吊车梁的某些受力特征、吊车梁的支座节点连接构造设计等进行了较详尽的分析,提出了满足冶金工业厂房大跨度、大吨位吊车梁系统受力和工艺要求的方法.     

在传统中探寻当代海报的本土设计

在设计国际化的影响下,中国现代视觉设计中充满了受西方影响的视觉语言,“国际化”视觉符号的泛滥与“本土化”视觉语言的失语视觉现象非常突出。作为当今社会人与人交流载体的海报设计,要走出一条“民族个性”的道路,就必须根植于民族文化土壤中,向传统学习,并进行具有创造性的转化,使传统文化符号在当代海报设计中既具有“民族个性”又有“时代性”,这样,我们海报设计才能真正走“国际化”。     

输气干线单个分输站站址最优化研究

输气干线分输站站址规划设计合理与否，直接影响到分输站至各城市门站之间输气管线总投资和未来管网系统的发展。为此,着重讨论并建立了以分输站站址、各城市门站与分输站之间管道直径、壁厚、分输站压力为设计变量，以各城市门站与分输站之间管道投资最小为目标函数的分输站站址优化数学模型。根据模型特点，采用混合离散变量复合形法与数据库技术相结合来求解分输站站址。以此站址为参考点，结合现场勘察，在参考点附近沿输气干线预选多个分输站站址，并对影响分输站建设和管理的环境因素用多目标模糊评价方法进行综合评价，以评价效果好的站址为最优分输站站址。用算例说明了分输站站址优化结果不仅与工艺参数变化有关，且与分输站所处环境因素有关。提出还应深入研究输气干线中具有多个分输站的站址优化问题。     

物探螺旋钻机钻杆液压夹紧机构的设计计算

利用ANSYS大型有限元分析软件,对新设计的物探螺旋钻机钻杆液压夹紧机构进行了数值模拟分析计算。分析计算结果表明,当钻杆液压夹紧机构的钳体材料选择ZG310-570,所用液压马达的排量为390 mL/r时,该系统在最小驱动压力4.82 MPa、最大驱动压力7.30 MPa时才能正常工作。这种数值模拟分析为进一步改善钻杆液压夹紧机构的受力,改进机构的设计提供了依据。     

节能设计在医院综合病房楼建筑工程中的应用

医院建筑能耗高,如在设计阶段对建筑、供暖与通风、给排水、电器照明等各环节进行节能设计,可以起到事半功倍的效果.文中结合工程实践,提出了各种具体节能措施.     

Using mechatronics to teach mechanical design and technical communication

It is commonly accepted that hands-on experiences increase both learning and enjoyment during coursework. Mechatronics projects provide both interesting and relevant hands-on experiences for a wide range of topics including design processes, basic mechatronics concepts, technical communication, and working in a group environment. ME2110: Creative Decisions and Design at Georgia Tech integrates mechatronics and technical communication into a sophomore level mechanical design class. This paper describes the course in detail, highlighting the course goals and layout, tools provided to the students, industry involvement, and the main challenges of administering such a course.     

胜利701气枪震源船改造设计

阐述胜利701气枪震源船震源系统的改造设计。改造设计使胜利701船达到了Ⅱ类航区海船的规范要求，满足了海上三维勘探和高分辨勘探的发展需要，为以后类似船舶的改造提供了经验。     

Optimal synthesis of tunable elastic wave-guides

Topology optimization, or control in the coefficients of partial differential equations, has been successfully utilized for designing wave-guides with precisely tailored functionalities. For many applications it would be desirable to have the possibility of drastically altering the wave-guiding properties of a device “on the fly,” in a controllable manner as an influence of some external input. This would enable wave-guides with highly non-linear input-output mappings, such as for example controllable wave switches.In this paper, we propose using finite elastic pre-straining for the purpose of tuning a wave-guide. In order to systematically formulate and solve the wave-guide synthesis problems we utilize mathematical programming methods in conjunction with topology optimization for parametrizing the design space. The resulting extremal problem is, from a practical point, equivalent to finding an optimal subdivision of a given control volume into two disjoint subsets occupied by two different materials, normally resulting in a highly heterogeneous elastic body with desired wave-guiding functionalities in the original and finitely deformed configurations.The proposed methodology is illustrated with numerical examples.