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《Marine Structures》2002,15(1):35-56
The axiomatic design approach proposed by N.P. Suh consists of the Independence Axiom and the Information Axiom. The Independence Axiom assists a designer in generating good design alternatives by considering the relationships between the functions and the physical product using a hierarchical mapping procedure. The Information Axiom, which is related to the probability of achieving the given functional requirements, can be used as a criterion for the selection of the best solution among the proposed alternatives in the conceptual or preliminary design stage.In the early stages of marine design, especially ship design, there exists a lot of uncertainty because of the size and complexity of a marine vehicle. This uncertainty often leads to a probabilistic approach rather than a deterministic approach. Ship designs are often routine, requiring small modifications of an existing, successful design. The availability of axiomatic design in this marine design field has been investigated through four examples: a conceptual thruster design, a foil-strut optimization problem, a main engine selection problem, and a barge design problem. By these examples, the possibility of the application of Design Axioms in marine design has been illustrated. 相似文献
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对大型货船舱室分隔和舱室布置的依据和原则、防火分隔的划分、防火材料的现状和应用、风管和电缆穿过防火分隔的保护方法、减少噪声途径等方面进行了总结,特别是对舱室防火作了重点介绍。对照国外船舶内装设计方法和有关资料,可以看出国内船舶内装设计和国外还存在一定差距。希望不久的将来,在船舶舱室专业设计人员的共同努力下,使内装设计水平得到进一步提高。 相似文献
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某型援潜救生船的月池舱口盖设计 总被引:1,自引:0,他引:1
某型援潜救生船首次采用月池吊放潜水钟进行潜救作业任务。因月池舱口盖的特殊性,在设计中就内部冲击载荷、隔离介质和特殊的作业要求等新问题进行了充分研究分析,找到了解决方法,最终确定该舱口盖的设计方案并经过实船试验验证。 相似文献
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为了在电气详细生产设计中能够快速并准确地选择合适的电缆桥架,通过结合电缆模型的排列并将之总结成运用公式,使设计者在选择电缆桥架时能够提高设计效率及正确性,船厂的应用表明,这种方法非常有效并可以满足船级社的要求。 相似文献
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As the size of ship has grown rapidly, the importance of exact fatigue strength assessment has been recognized more and more. High concern about fatigue crack often raises target fatigue life to two or three times of ship lifetime. This leads to the use of very thick plates to reduce dynamic stress range or the application of weld toe grinding to reduce stress concentration or removing weld defects. However, such measures can cause some troubles in fabrication process. As a fatigue strength assessment procedure, full stochastic fatigue analysis based on wave loads analysis has been recommended due to its high accuracy and straightforward approach. However, its huge computing time hinders a ship designer from making iterative explorations for a better design to minimize the use of aforementioned measures.This paper proposes an efficient approach to optimize plate thicknesses around hot spots and the applications of weld toe grinding with meeting the required target fatigue life based on the full stochastic fatigue assessment. Two conflicting objectives are taken into consideration; to minimize steel weight and to minimize total weld toe grinding length. Whether to employ weld toe grinding or not for a hot spot can be seen as a selection variable. In order to treat such selection variables along with continuous variables in the multi-objective optimization, Multi-objective Genetic Algorithm (MOGA) is introduced. This paper also employs adaptive approximation framework to resolve the computational burden of the full stochastic fatigue analysis in the optimization. The strategy to refit approximations iteratively can minimize the required number of analysis. A convergence criterion of the adaptive approximation framework is newly proposed considering the feature of discrete objective function attributed to the introduction of selection variables. One of the objective functions, toe grinding length, is purely depending on how many hot spots toe grindings are applied to. The proposed approach is applied to a liquid dome opening problem of LNG carrier, which is known as one of the most difficult parts to satisfy required fatigue strength due to the stress concentration caused by its large opening and weld attachments on upper deck. 相似文献
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通过分析人工排列的思考过程和实际经验,提出一种解决二维规则物体排列问题的算法.通过计算可放置点和可放置空间,高效解决物块的排列问题.应用遗传算法,求得最优的排列方案.实际应用证明了该算法的有效性. 相似文献
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船舶内装设计在现在和过去的相当长的时间内不被重视,尤其是内装设计中的色彩设计更是被严重忽视。随着我国船舶建造综合能力的不断提升和船上人员对生活工作环境要求的日益提高,船舶居住和工作舱室的装饰显得格外重要。本着"以人为本"的理念论述了船舶内装人性化设计三个方面课题,并以我国设计制造的"海洋石油201"号大型海洋铺管船为例,说明该船内装设计以"海上彩虹"为主题,运用色彩学原理,结合人体工效学,突破传统,大胆创新,对该船的内装工程进行了包括舱室布置、内装方案效果图和施工节点在内的内装设计,取得了良好的效果。 相似文献
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UUV外形和总体布局分析 总被引:1,自引:0,他引:1
The construction and shape of UUVs are described in the paper.UUV design is the shape of the overall design of unmanned underwater vehicle should first be resolved UUV underwater vehicle directly affects the shape of the resistance and noise,which is related to energy,payload,maneuverability and concealment UUV problem The main characteristic and parameter tables for foreign torpedo shape,flat shape and anomalous shape are also given in the paper.The general layout of typical foreign UUVs is analyzed in detail.And the total layout figure and interior constructive figure are introduced.Torpedo-type because of its good water power and low noise,no one has been the main form of underwater vehicle-like,and many designers are now highly favored because of its stable performance,anti-environmental interference capability.Other irregular shapes designed primarily for the completion of a specific task,according to the specific environment and mission requirements.According to comparing and summarizing,some suggestions and conclusions are presented. 相似文献
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单体小水线面水翼艇的概念设计 总被引:2,自引:0,他引:2
本文针地一般11.9m长的交通艇提出了单体小水互面水翼艇的设计方案。介绍了该艇的水翼配置与线型设计,以及艇的稳性和阻力计算。计算表明,设计艇具有良好的水动力性能。 相似文献
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Naonosuke Takarada 《Journal of Marine Science and Technology》1996,1(2):85-93
Conclusion The issue of environmental preservation covers an extremely broad area, and the large majority of it is outside of the range
of speciality of the ship designer. The most important point for us revolves around the question of how we, together with
the operators, should perceive the problem and work to improve ship design accordingly. I would hope that this paper has been
useful in deepening our perception of ship-related environmental issues, not only with regards to big ships and headline-making
disasters, but also in relation to small ships and everyday operation.
Presented at the International Conference on Technologies for Marine Environment Preservation (MARIENV’95), Tokyo, Japan,
September 24–29, 1995 相似文献
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基于数据库的船体大表面分舱方法研究 总被引:2,自引:0,他引:2
描述了用无界平面逐步分割船体内部任意有界空间,从而划分出每个舱室的计算机辅助设计方法,其关键技术是建立在数据库基础上的B-rep方法应用。提出了较完整的关于船体及其内部各种不同形状和位置的舱室几何拓扑关系的描述。解决了船体内部空间分隔具有任意性的问题,可以获得任意一个舱室或多个组合舱室的点、线和面的完整数据信息。实船的分舱设计结果证明了该方法的先进性和实用性。 相似文献
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为设计某浸没式喷水推进泵,以某小型轴流式喷水推进泵为对象建立浸没式喷射模型,采用CFD方法模拟分析浸没喷射对喷泵水力性能的影响。研究表明,浸没式喷射对喷泵水力性能的影响变化不大。根据喷水推进和船体边界层基本理论,考虑喷泵工作环境不同时的水力特性变化,基于Matlab/simulink仿真平台建立浸没式喷水推进泵水力设计参数选型程序,实现快速高效地得到喷泵基本设计参数为设计者提供设计依据。根据选型结果运用三元理论设计出所需喷泵,运用CFD方法获取浸没式喷泵的敞水水力性能,并安装到实尺度船上预报推进性能,结果表明浸没式推进系统具有较高的推进效率、满足快速性要求,验证了设计参数选型程序的适用性。 相似文献
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探讨了动态分布式布置形式,以解决现有的设施布置形式不能满足产品多样化企业需求的问题。同时分析了在产品品种和需求发生周期性变化,并在每周期开始要重新规划的情况下分布式布置设计的步骤及数学模型,其目的是比较周期间重新规划的成本和每个周期内的物流效率。 相似文献
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采用传统控制策略对低脉冲逆变装置的交流电流控制器进行设计时,控制器系统带宽通常会接近系统的基波频率,导致系统动态响应变差。提出了一种改进的电流控制策略,通过状态反馈控制的极点配置方法克服了这一难题,从而大大提高线性控制器的增益。电流控制器的设计以离散条件下的线性状态空间设计为原则,可使控制系统的动态响应和稳定性能更加优越,且系统具有更强的鲁棒性。最后,对设计结果进行了仿真。结果表明,基于状态反馈控制规律的极点配置法所设计的电流控制器比传统的PR设计方案具有更好的动态性能。 相似文献