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CFD based Hydrodynamic Optimization and Structural Analysis of the Hybrid Ship Hull

机译：基于CFD的混合动力船体水动力优化与结构分析

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The US Navy is currently considering the introduction of a Flight III variant beginning with DDG-123 in Fiscal Year 2016. The new design incorporates a new combat system and associated power and cooling upgrades. The overall system improvements increase the payload of the ship and the resulting increased displacement has a negative impact on the service life allowance for range, fuel consumption and sea-keeping characteristics. The present objective is to increase the hull displacement without resistance and sea-keeping penalty and with minimal modifications to the baseline DTMB-5415 design (open literature surrogate of the existing DDG-51 hull form) by using retrofitted blisters in the form of side hull expansions and a bow-bulb. The investigation makes use of high-performance CFD computing for analysis of wave cancellation mechanisms, reduced order, rapid hydrodynamic analysis codes, general purpose finite element modeling and structural integrity analysis, sea-keeping evaluation for cost and performance tradeoffs, geometric sensitivity studies and multi-objective optimization. A candidate modified 5415 design with both blisters and bow bulb shows a resistance reduction of ～11% w.r.t. the baseline 5415 in the design speed range of 15-19 knots, even though the displacement is increased by 8%, such that the transport factor is increased by 19%.
机译：美国海军目前正在考虑从2016财年开始以DDG-123开始的第三次飞行的变型。新设计结合了新的战斗系统以及相关的动力和冷却系统。整个系统的改进增加了船舶的有效载荷，因此增加的排水量对航程，燃油消耗和海上航行特性的使用寿命产生了负面影响。当前的目标是通过使用侧面船体形式的改型水泡来增加船体排水量，而不会增加阻力和保持海况，并且对DTMB-5415基线设计（现有DDG-51船体形式的公开文献进行了最小限度的修改）扩展和弓形灯泡。该调查利用高性能CFD计算技术来分析消波机制，降阶，快速流体动力学分析代码，通用有限元建模和结构完整性分析，成本和性能折衷的海上评估，几何灵敏度研究以及多项目标优化。候选的改型的5415设计同时带有水泡和弓形灯泡，其阻力降低了约11％w.r.t。在15-19节的设计速度范围内，基准线5415即使位移增加了8％，因此运输系数也增加了19％。

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