Robust Design Optimization for the refit of a cargo ship using real seagoing data
Robust Design Optimization for the refit of a cargo ship using real seagoing data
复制标题
DOI：
10.1016/j.oceaneng.2016.06.029
复制
发表时间：
2016-09
影响因子：
5
通讯作者：
D. Peri
中科院分区：
文献类型：
--
作者：
D. Peri
稳健设计优化（RDO）是一个非常有趣的机会，当设计规范是仔细和准确的：- 针对真实的使用情况优化工业对象的可能性，在降低发生非设计条件的风险的同时提高总体性能，严格取决于寿命期内各种操作条件发生概率信息的可用性的设计。这些数据通常在原型生产之前是不可用的，但是，一旦设计完成并可操作，就可以收集导航数据并用于修改（改装）目前的设计，可能在其寿命的早期阶段，为了使设计适应于真实的操作条件，在使用寿命仍然足够长以允许回收成本时，在本文中，对五艘姊妹船进行了为期两个月的观察，记录了它们的运行数据。导出了速度和位移的统计分布。然后应用优化框架，并提出了一些修改的一小部分的船体，以显着提高性能的船体，降低运营成本的船舶。采用专用的数值技术，以减少重新设计活动所需的时间。
Robust Design Optimization (RDO) represents a really interesting opportunity when the specifications of the design are careful and accurate: the possibility to optimize an industrial object for the real usage situation, improving the overall performances while reducing the risk of occurrence of off-design conditions, strictly depends on the availability of the information about the probability of occurrence of the various operative conditions during the lifetime of the design. Those data are typically not available prior than the production of a prototype.However, once the design has been produced and is operative, navigation data can be collected and utilized for the modification (refitting) of the current design, possibly in an early stage of its lifetime, in order to adapt the design to the real operative conditions at a time when the lifetime is still long enough to allow the payback of the cost of the modification by the obtained savings.In the present paper, five sister ships have been observed for a time period of two months, recording their operative data. Statistical distribution of speed and displacement are derived. An optimization framework is then applied, and some modifications of a small portion of the hull are proposed in order to increase significantly the performances of the hull, decreasing the operative cost of the ship. Dedicated numerical techniques are adopted in order to reduce the time required for the re-design activities.