董华超, 王鹏, 张益进. 翼身融合水下滑翔机舱体−骨架耦合结构的离散优化设计[J]. 中国舰船研究, 2021, 16(4): 70–78. doi: 10.19693/j.issn.1673-3185.02178
引用本文: 董华超, 王鹏, 张益进. 翼身融合水下滑翔机舱体−骨架耦合结构的离散优化设计[J]. 中国舰船研究, 2021, 16(4): 70–78. doi: 10.19693/j.issn.1673-3185.02178
DONG H C, WANG P, ZHANG Y J. Discrete optimization design for cabin-skeleton coupling structure of blended-wing-body underwater glider[J]. Chinese Journal of Ship Research, 2021, 16(4): 70–78. doi: 10.19693/j.issn.1673-3185.02178
Citation: DONG H C, WANG P, ZHANG Y J. Discrete optimization design for cabin-skeleton coupling structure of blended-wing-body underwater glider[J]. Chinese Journal of Ship Research, 2021, 16(4): 70–78. doi: 10.19693/j.issn.1673-3185.02178

翼身融合水下滑翔机舱体−骨架耦合结构的离散优化设计

Discrete optimization design for cabin-skeleton coupling structure of blended-wing-body underwater glider

  • 摘要:
      目的  运用基于数据驱动的离散优化思路,对翼身融合水下滑翔机舱体−骨架耦合结构进行优化设计。
      方法  首先,采用一种Kriging辅助的离散全局优化(KDGO)算法解决计算代价昂贵的黑箱问题,该算法采用一种新颖的加点策略来捕获性能较好的离散样本点,并在该加点策略中引入多起点数据挖掘方法,主要包含多起点优化、投影、采样和选择4个阶段。其次,建立骨架−舱体耦合结构的参数化模型,并对耦合结构进行吊放变形和深水受压工况的有限元分析。接着,以浮−重比为目标,把骨架结构、舱体结构的强度与稳定性指标作为约束,同时考虑外形和舱体之间的干涉以及骨架和舱体的耦合关系,建立整体耦合结构的离散优化数学模型。最后,将离散优化算法与耦合结构仿真相结合,搭建整体优化框架,同时采用KDGO算法进行200次函数评估,并对实验设计(DOE)采样阶段最优可行点和优化后全局最优点进行对比。
      结果  结果显示,全局最优点所对应耦合结构的浮−重比提升了近40%,结果令人满意。
      结论  所做研究可为翼身融合水下滑翔机舱体−骨架耦合结构的设计提供参考。

     

    Abstract:
      Objectives  The cabin-skeleton coupling structure of a blended-wing-body underwater glider is optimized using a data-driven discrete optimization concept.
      Methods  First, a Kriging-assisted discrete global optimization algorithm (KDGO) is proposed for computationally expensive black-box problems. The KDGO uses a novel infill-sampling strategy to capture discrete sample points with better performance, and introduces a multi-start method with a data mining strategy, including multi-start optimization, projection, sampling and selection. Second, a parametric cabin-skeleton coupling structure model is established using the finite element analysis method under lifting deformation and deep-water pressure conditions. The float-to-weight ratio and strength and stability of the cabin-skeleton structure are taken as the goal and constraints respectively. Considering the interference between shape and cabin, and the coupling relationship between cabin and skeleton, a discrete optimization mathematical model of the overall coupling structure is established. Finally, the discrete optimization algorithm and coupling structure simulation are combined to build an overall optimization framework.
      Results  By using KDGO to conduct 200 function evaluations and comparing the optimal feasible points in design of experiments (DoE) with the global optimal feasible points after optimization, it is found that the optimized float-to-weight ratio of the coupling structure is increased by nearly 40%, representing satisfactory results.
      Conclusion  The results of this study can provide valuable references for the cabin-skeleton coupling structure design of blended-wing-body underwater gliders.

     

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