Journal of Ship Production and Design最新文献

筛选

英文中文

Research on Key Technologies for Container Ship Loading Test Based on 3D Laser Scanning 基于 3D 激光扫描的集装箱船装载测试关键技术研究

Journal of Ship Production and Design Pub Date : 2024-02-28 DOI: 10.5957/jspd.09230025

Rui Li, Lei Liao, Ji Wang, Shilin Huo, Hexin Wan

{"title":"Research on Key Technologies for Container Ship Loading Test Based on 3D Laser Scanning","authors":"Rui Li, Lei Liao, Ji Wang, Shilin Huo, Hexin Wan","doi":"10.5957/jspd.09230025","DOIUrl":"https://doi.org/10.5957/jspd.09230025","url":null,"abstract":"\u0000 \u0000 Traditional accuracy check methods for cargo hold in container ships rely solely on manual and visual operations, which are time-consuming and resource-intensive. Addressing the challenge of extracting and analyzing key data, such as cell guides and container pedestals, from large-scale point clouds obtained through three-dimensional (3D) laser scanning in container ship trial runs, this paper proposes an algorithmic framework based on 3D laser scanning. Building upon this framework, an improved coordinate-axis filtering RANSAC algorithm is employed to optimize the extraction of cell guide planes. Additionally, an algorithmic process based on Bhattacharyya distance is utilized to automatically extract container pedestal point clouds. Furthermore, a combination of the genetic algorithm and the ICP algorithm is proposed to achieve the fitting of the container pedestal edge contour through point cloud registration. Experimental results demonstrate the consistency between the extracted cell guide and container pedestal data and the actual results, indicating the high practical value of the proposed methodology.\u0000 \u0000 \u0000 \u0000 container ship loading test; cargo hold accuracy check; 3D point cloud processing\u0000","PeriodicalId":509716,"journal":{"name":"Journal of Ship Production and Design","volume":"16 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140418695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Methodology for Ship Cabin Equipment Layout Considering Human Factor Reliability Optimization 考虑人为因素可靠性优化的船舱设备布局方法论

Journal of Ship Production and Design Pub Date : 2024-02-22 DOI: 10.5957/jspd.11230031

Qiaoyu Zhang, Hongshuo Zhang, Yan Lin, Yuansong Yang, Haiyang Liu

{"title":"A Methodology for Ship Cabin Equipment Layout Considering Human Factor Reliability Optimization","authors":"Qiaoyu Zhang, Hongshuo Zhang, Yan Lin, Yuansong Yang, Haiyang Liu","doi":"10.5957/jspd.11230031","DOIUrl":"https://doi.org/10.5957/jspd.11230031","url":null,"abstract":"\u0000 \u0000 The paper proposes an innovative methodology of Human Cognitive Reliability- Cognitive Reliability and Error Analysis Method (HCR-CREAM) coupled with A* search and genetic algorithm (GA) to tackle ship cabin equipment layout considering human factor reliability optimization with the goal of minimizing human error probability (HEP) subjected to practical requirements. After establishing the mathematical model of cabin equipment inspection tasks in ship cabin equipment layout problem through HCR-CREAM and equipment geometric simplification, a method of the horizontal movement based on minimum distance is presented to avoid the equipment overlapping, then A* search is used for planning inspection paths and GA with selection, crossover, and mutation operators is applied to solve equipment layout results. A case of equipment layout in a certain ship engine room has been taken to carry out parameter sampling experiments by Latin Hypercube for GA. The results show the solution effect of GA is less affected by its parameter variation. And through the comparison with the initial equipment layout, the indicators influencing the HEP of the optimized result have been improved, thus significantly reducing HEP.\u0000 \u0000 \u0000 \u0000 ship cabin equipment layout; human factor reliability optimization; HCRCREAM; A* search; genetic algorithm\u0000","PeriodicalId":509716,"journal":{"name":"Journal of Ship Production and Design","volume":"14 S7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140438737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Arc Additive Manufacturing Process and Mechanical Properties of Inconel 625 Nickel-Based Alloy Bulk 英科乃尔 625 镍基合金块体的电弧增材制造工艺和力学性能研究

Journal of Ship Production and Design Pub Date : 2024-02-21 DOI: 10.5957/jspd.09230022

Dong Sheng Zhao, Tang Ren Niu, Ji Wang, Yu Jun Liu

{"title":"Study on the Arc Additive Manufacturing Process and Mechanical Properties of Inconel 625 Nickel-Based Alloy Bulk","authors":"Dong Sheng Zhao, Tang Ren Niu, Ji Wang, Yu Jun Liu","doi":"10.5957/jspd.09230022","DOIUrl":"https://doi.org/10.5957/jspd.09230022","url":null,"abstract":"\u0000 \u0000 The melt-inert gas-shielded arc additive manufacturing experiment of Inconel 625 nickel-based alloy bulk was carried out. The influence of current mode, current, travel speed, weld bead spacing, deposition path, and arc length on the formation of overlapping weld beads was studied. The incomplete fusion near the bottom weld toe of adjacent weld beads was the main defect. The optimized parameters for bulk additive manufacturing obtained from the experiment were as follows: pulse current of 70 A, travel speed of 200 mm/min, weld bead spacing of 3 mm, dry extension of 10 mm, continuous deposition, and arc length of 1 mm. Due to the thermal influence during the deposition of adjacent weld beads, directional grains were formed inside the weld bead and at the boundary with adjacent weld beads. However, the direction of grain growth was not uniform throughout the entire weld bead, and a consistent texture of the entire weld bead was not formed. The tensile strengths of the specimens in the X, Y, and Z directions were 858.5, 838.7, and 827.2 MPa, respectively, and the fracture elongations were 53.3%, 37.6%, and 42.1%, respectively. The strength in the Z direction, which is the vertical direction, was the lowest.\u0000 \u0000 \u0000 \u0000 arc additive manufacturing; nickel-based alloy; incomplete fusion; texture\u0000","PeriodicalId":509716,"journal":{"name":"Journal of Ship Production and Design","volume":"18 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0