共查询到20条相似文献,搜索用时 203 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
为全面分析舰船自给力设计要素,以标准规范中的定义为基础,结合舰船设计及使用情况,分析舰船自给力的概念;从食品和淡水两方面阐述自给力的影响因素、设计方法及主要设计参数选取;对舰船自给力研究的未来方向进行展望,提出需重点针对食品高效贮存、食品长时保鲜、海水淡化深度处理等技术进行研究,以在舰船总体资源有限的情况下,为舰员提供新鲜的食品、健康的饮水,提高舰船自给力水平。 相似文献
10.
11.
概述环境工程标准在型号产品中的应用情况,分析了当前环境工程标准的特点、数量及其在产品的实施中发挥的作用及存在的问题,并提出了一些建议,为今后环境工程标准的修订、完善奠定了基础,为从事该项目工作人员提供参考。 相似文献
12.
13.
14.
The paper outlines a rational design procedure for bridge piers and pylons against ship collision impacts. Firstly, a set of risk acceptance criteria are proposed. This is followed by a mathematically based procedure for calculation of the probability of critical ship meeting situations near the bridge, and the probability of ship collision accidents caused by human errors as well as technical errors. This first part of the paper leads to identification of the largest striking ship, “design vessels”, a given bridge pier must withstand without structural failure in order for the bridge connection to fulfil the risk acceptance criteria. The final part of the paper is devoted to an analysis of the needed impact capacity for the bridge pylons and piers exposed to ship bow impact loads from these “design vessels”. For a number of different ship types and different tonnage merchant vessels, load – displacement relations for ship bow collisions against rigid walls are derived. Based on these comprehensive numerical results, a new empirical relation is derived which is suited for design against bow collisions. This expression for maximum bow collision forces is compared with a previously published expression for ice-strengthened ships and with existing standards for assessment of bow crushing forces. It is shown that there is need for an update of these existing standards. For design of piers and pylons against local impact pressure loads, a pressure - area relation for bulbous bow impacts is derived. 相似文献
15.
我国有数量庞大的渔业船舶,其稳性对船舶安全生产、船型设计开发等方面产生重要影响。本文整理现行渔业船舶稳性衡准要求;分析稳性衡准数的数理实质;进而应用国内外普遍认可的总体设计软件NAPA进行渔业船舶稳性衡准数核算方法研究开发。有助于提高对渔业船舶稳性的认知水平和校核能力,亦可为具备类似衡准要求的其他船型设计研发及稳性校核工具开发提供借鉴。 相似文献
16.
研究和编制了深海采矿船技术标准(船型评估/认可和审图);介绍了该船型的现行规范标准应用,入级符号及附加标志,送审文件,船舶设计基础及环境条件,航行及在位状态下的布放、作业、自存等工况和配套的多种组合装载模式;提出了该类船舶的评估技术标准。作为全球范围内首个专门针对深海采矿船这一新颖船型的评估技术标准,对我国自主开发、设计、建造深海采矿船具有重要指导意义。 相似文献
17.
C. G. Daley 《Marine Structures》2002,15(6):1-559
A new International Association of Classification Societies standard for polar ship design, in the form of a unified requirement is being developed by an international committee with representatives from many classification societies and with the active participation of many polar nations. The framing structural requirements have been developed by a combination of analysis of existing rules and ships, finite element (FE) analysis and analytical solutions of plastic collapse mechanisms. This paper describes the derivation of the 3-hinge and asymmetrical shear plastic collapse mechanisms using work–energy principles. Energy methods are robust and well suited for developing design standards. The results are shown to compare well with non-linear FE analyses of frame strength. 相似文献
18.
结合船舶下舵承在设计、安装和船舶营运过程中面临的问题,根据船级社相应规范和标准对船舶下舵承的规定,分析舵承间隙及结构,提出相应的解决方案。实践证明该方案可行。 相似文献
19.
舰船轴系用高强度液压紧配螺栓研究的技术进展 总被引:1,自引:0,他引:1
分析了国内外舰船和电站中液压紧配螺栓的研究应用现状,阐述了轴系用高强度液压紧配螺栓的设计理念,列出了各国船级社对液压紧配螺栓直径量的选取及相关要求,指出了现阶段存在的主要问题以及今’后的主要研究方向。 相似文献
20.
针对苏伊士型油船,基于共同结构规范进行了较详细的全船结构设计分析,并探讨了共同结构规范的特点及其对该型船设计的影响。 相似文献