基于几何的早期船体外形可生产性筛选度量
Geometry-Based Metrics for Early-Stage Hull-Form Producibility Screening
- National Research Council-Institute of Marine Engineering（国家研究委员会海洋工程研究所）
- University of Michigan（密歇根大学）
机构由 AI 辅助整理，请以论文原文为准。
中文总结 AI 辅助
本文提出一种基于几何的船体可生产性早期筛选框架，通过无量纲可展性偏差、曲率面积分数等签名，在BRep和网格表示上评估，并在多个船型上验证，为后续优化提供几何筛选层。
中文摘要 AI 辅助
本文提出了一种表示感知框架，用于在早期设计阶段对船体外形可生产性进行基于几何的筛选。所提出的签名结合了无量纲总偏差和带符号的可展性偏差、曲率类别面积分数、分布场、度量特定有效性和表示来源。这些描述符表征了与板材成型和可展性相关的表面特征，但不是制造成本、成型工作量或工艺可行性的校准预测器。原生IGES/STEP边界表示（BReps）通过直接微分几何和裁剪域求积进行评估，而三角化表面则使用离散曲率恢复和面积加权聚合。解析和半解析控制验证了公式，而匹配面BRep到网格测试评估了离散曲率恢复。应用于DTMB 5415、KCS、JBC和KVLCC2M表明，曲率强度和面积范围提供互补信息，且基于导数的结果可能对表示敏感。例如，KCS的可展性偏差比DTMB 5415大约24%，而双曲区域占其有效表面的72.9%，而DTMB有效表面几乎全部为双曲区域。所得量提供了早期几何筛选层，可随后用作目标、约束、代理响应或设计空间特征。配套开源软件HullProd实现了该签名、分布场、有效性和来源。
英文摘要
This paper presents a representation-aware framework for geometry-based screening of hull-form producibility at early design stages. The proposed signature combines dimensionless total and signed developability deviation with curvature-class area fractions, distributed fields, metric-specific validity, and representation provenance. These descriptors characterize surface features relevant to plate forming and developability, but are not calibrated predictors of fabrication cost, forming effort, or process feasibility. Native IGES/STEP boundary representations (BReps) are evaluated through direct differential geometry and trimmed-domain quadrature, whereas triangulated surfaces use discrete curvature recovery and area-weighted aggregation. Analytical and semi-analytical controls verify the formulation, while matched-face BRep-to-mesh tests assess discrete curvature recovery. Application to DTMB 5415, KCS, JBC, and KVLCC2M shows that curvature intensity and areal extent provide complementary information and that derivative-based outcomes can be representation sensitive. KCS, for example, exhibits approximately 24% greater developability deviation than DTMB 5415, while double-curved regions occupy 72.9% of its valid surface versus nearly the entire DTMB valid surface. The resulting quantities provide an early geometric screening layer for subsequent use as objectives, constraints, surrogate responses, or design-space features. HullProd, the companion open-source software, implements the signature, distributed fields, validity, and provenance.
