International Journal of Naval Architecture and Ocean Engineering最新文献

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An experimental study on the gap flow of floating bodies near a quay wall 码头附近浮体间隙流动的实验研究

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100704

Kyeonguk Heo, Dong-Min Park, Dongho Jung

This study experimentally investigates wave elevations induced by gap flow when floating bodies are positioned near a quay wall. Two-dimensional wave flume tests were conducted with models of uniform breadth, considering the number of floating bodies, hull geometry, and quay–ship gap distance as independent variables, while water depth and breadth were fixed. Incident wave amplitudes of 1.5 cm and 2.5 cm and a wide range of wave periods were applied. The results confirmed that piston-mode resonance occurs under both single- and two-body conditions. For the single-body case, the resonance frequency shifted to higher values as the quay–ship gap narrowed, with midship sections showing stronger responses than rectangular sections. A similar trend was observed for the two-body case, where resonance appeared not only between the quay and ship but also between the two ships. The resonance frequency in both gaps shifted to higher values as the gap distance decreased, and dual peaks were observed due to the coexistence of two resonance modes. The response amplitude was again more pronounced for midship sections. These findings enhance the understanding of gap flow in simultaneous bunkering scenarios and provide reliable experimental data for validating numerical simulations and assessing mooring safety.

实验研究了当浮体靠近码头壁面时，由间隙流引起的波浪高程。采用等宽模型进行二维波浪水槽试验，以浮体数、船体几何形状和岸船间隙距离为自变量，水深和宽度固定。入射波振幅为1.5 cm和2.5 cm，波周期范围广。结果证实了活塞模共振在单体和双体条件下都存在。在单船体情况下，随着岸船间隙的缩小，共振频率向更高的值偏移，船中截面比矩形截面的响应更强。在双体情况下也观察到类似的趋势，不仅在码头和船舶之间，而且在两艘船舶之间也出现了共振。随着间隙距离的减小，两个间隙内的共振频率均增大，两种共振模式共存，形成双峰。船中部部分的响应幅度再次更为明显。这些发现增强了对同时加注情况下间隙流动的理解，并为验证数值模拟和评估系泊安全性提供了可靠的实验数据。

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引用次数: 0

Enhancing passage efficiency in cabin spaces: A layout optimization approach for submarine integrating intelligent algorithms and passage capacity 提高舱室空间通行效率：一种集成智能算法和通行能力的潜艇布局优化方法

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100672

Jing Chen , Mingjiu Yu , Weilan An , Qiuyuan Zhu , Hao Fan

Confined spaces in submarines pose a serious barrier to crew operations and mobility. To enhance internal passage efficiency in submarines, this study proposed the Passage Efficiency Driven Layout Optimization Strategy (PEDLOS), which considers passage capacity as a key factor. Congestion risks were identified using a passage simulation of the current simulated layout. After building a network of passage nodes, the shortest path matrix was computed by Dijkstra's algorithm, which also involved passage coefficients for revision. An optimal layout scheme that balanced circulation passage efficiency, adjacency, and circulation requirements was subsequently produced by multi-objective optimization based on genetic algorithm. The PEDLOS could provide an innovative approach to enhance internal passage efficiency and overcome the limitations of current layout methods that unduly rely on expert experience and overlook passage capacity drivers. The study provides theoretical and practical support for confined space design by incorporation of passage capacity as a major optimization indicator.

潜艇的密闭空间严重阻碍了艇员的操作和机动性。为了提高潜艇内部通道效率，本文提出了以通道容量为关键因素的通道效率驱动布局优化策略（PEDLOS）。使用当前模拟布局的通道模拟来识别拥堵风险。在建立通道节点网络后，使用Dijkstra算法计算最短路径矩阵，其中还涉及到通道系数进行修正。通过基于遗传算法的多目标优化，得到了平衡流通通道效率、邻接性和流通需求的最优布局方案。PEDLOS可以提供一种创新的方法来提高内部通道效率，克服当前布局方法过度依赖专家经验和忽视通道容量驱动因素的局限性。研究结果为以通道通行能力为主要优化指标的密闭空间设计提供了理论和实践支持。

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引用次数: 0

Centralized AA-SIPP-based collision-avoidance path planning for multi-USV operations incorporating dynamic constraints 基于集中式aa - sipp的多无人潜航器动态约束避碰路径规划

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01 DOI: 10.1016/j.ijnaoe.2025.100708

Si-Won Kim , Geon-Woo Kim , Jung-Hyeon Kim , Sun-Hyuck Im , Seong-Hyeon Jeong , Jin-Hyeok Seo , Yeon-Su Kim , Jong-Yong Park

With the growing deployment of multi-USV (unmanned surface vehicle) systems for complex maritime operations, coordinated path planning is critical for safety and efficiency in congested waterways. Classical multi-agent path finding (MAPF) methods, however, often neglect vessel kinematics and collision envelopes, yielding trajectories that are impractical or unsafe at sea. We present a centralized planning framework based on any-angle Safe Interval Path Planning (AA-SIPP) augmented with a vessel-specific maximum yaw-rate constraint. This yields smooth, kinematically feasible trajectories while preserving continuous-time separation. The approach is validated in high-fidelity Gazebo marina simulations involving up to 20 USVs based on the WAM-V platform. Compared with Conflict-Based Search (CBS), a representative grid-based MAPF algorithm, our framework maintained the prescribed safety distances and achieved zero collisions across all scenarios considered, whereas CBS exhibited separation violations in simulation. The method also scales well: mission makespan remained nearly constant as fleet size increased. These results support the applicability of dynamically constrained MAPF to maritime coordination in congested environments.

随着越来越多的多usv（无人水面车辆）系统用于复杂的海上作业，协调路径规划对于拥挤水道的安全和效率至关重要。然而，经典的多智能体路径寻找（MAPF）方法往往忽略了船舶的运动学和碰撞包络，产生的轨迹在海上是不切实际的或不安全的。我们提出了一个基于任意角度安全间隔路径规划（AA-SIPP）的集中规划框架，并增强了船舶特定的最大偏航率约束。这产生了平滑的、运动学上可行的轨迹，同时保持了连续时间的分离。该方法在基于WAM-V平台的多达20艘usv的高保真Gazebo码头模拟中得到了验证。与具有代表性的基于网格的MAPF算法Conflict-Based Search （CBS）相比，我们的框架在所有考虑的场景中都保持了规定的安全距离并实现了零碰撞，而CBS在模拟中表现出分离违规。该方法的可扩展性也很好：随着机队规模的增加，任务完工时间几乎保持不变。这些结果支持了动态约束MAPF在拥挤环境下海事协调中的适用性。

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引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

IF 3.9 3区工程技术 Q2 ENGINEERING, MARINE

International Journal of Naval Architecture and Ocean Engineering

Pub Date : 2025-01-01

引用次数: 0

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