International Shipbuilding Progress最新文献_第3页

Hazard analysis of a yacht designed for people with disabilities 专为残疾人设计的游艇的危害分析

IF 0.8

International Shipbuilding Progress Pub Date : 2021-10-08 DOI: 10.3233/isp-201007

B. Branowski, M. Zablocki, Jarosław Gabryelski, Andrzej Walczak, P. Kurczewski

{"title":"Hazard analysis of a yacht designed for people with disabilities","authors":"B. Branowski, M. Zablocki, Jarosław Gabryelski, Andrzej Walczak, P. Kurczewski","doi":"10.3233/isp-201007","DOIUrl":"https://doi.org/10.3233/isp-201007","url":null,"abstract":"Introduction: In connection with the design of a seaworthy yacht for persons with disabilities, authors conduct a risk analysis and consider the safety aspects arising from these risks. In the context of tourism and recreation for people with disabilities, this represents a new issue in the literature. Aim: The aim of the analysis was a multi-aspect evaluation of the hazards that occur when sailors with disabilities carry out typical activities on a yacht. The recommendations arising from the conducted research were used when designing the structure of a staysail schooner intended to be sailed by people with disabilities. Methods: Two methods of risk analysis were adopted. A preliminary hazard analysis (PHA) was carried out with the purpose of identifying and evaluating the possibility of people with various types of disabilities carrying out activities on a yacht. A process hazard analysis (PRHA) was based on a four-degree structure of functions with 31 component operations, relating to both sailing and living on a yacht. This methodology was used by the authors in sailing for the first time when the yacht’s equipment was designed for persons with disabilities. Results: The evaluation covered the adaptation of the yacht for sailing by people with disabilities and considered the various functions that would need to be carried out by these people. A PRHA matrix was created, consisting of 1,116 fields. Authors found that safe execution of many of the relevant functions by people with various types of disabilities was indicated. Conclusions: Based on the results of the PRHA, a set of new guidelines was created for permanent and temporary adaptations of a yacht in the context of the degrees and causes of disabilities.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42521264","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: 2

A FAST assembly simulation analysis method for hull blocks with engineering constraints 工程约束下船体块体FAST装配仿真分析方法

IF 0.8

International Shipbuilding Progress Pub Date : 2021-10-08 DOI: 10.3233/isp-210009

Guan Guan, Hongling Liao, Qu Yang

{"title":"A FAST assembly simulation analysis method for hull blocks with engineering constraints","authors":"Guan Guan, Hongling Liao, Qu Yang","doi":"10.3233/isp-210009","DOIUrl":"https://doi.org/10.3233/isp-210009","url":null,"abstract":"In order to effectively improve the assembly efficiency for hull blocks, an assembly simulation analysis method considering engineering constraints is proposed in this paper, and an integrated system of shipbuilding accuracy analysis and assembly analysis considering multi-constraints is developed. The method is divided into pre-matching model and fine matching model. In the pre-matching model, an Improved Coherent Point Drift (ICPD) algorithm is used to obtain more accurate initial matching values. The fine matching model firstly uses the Analytic Hierarchy Process (AHP) algorithm to automatically obtain the constrained weights, then the weights vector is used to add the assembly constraints for hull blocks such as straightness, hard point constraints etc. into the multi-objective optimization function. By solving the function, the optimum positioning location and the most reasonable adjustment scheme are obtained. This method shortens the occupancy time of the equipment used to build the hull, reduces the workload of the staff, and improves the efficiency and quality of shipbuilding. The integrated system adds engineering constraints analysis module and the function of automatically finding and eliminating error measurement points. Through the verification of the examples, the integrated system realizes the automation and intellectualization of the assembly for hull blocks.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49424108","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

Editorial 社论

IF 0.8

International Shipbuilding Progress Pub Date : 2021-07-07 DOI: 10.3233/isp-210526

P. Wellens

引用次数: 0

Ship design complexity, sources, drivers, and factors: A literature review 船舶设计复杂性，来源，驱动因素和因素:文献综述

IF 0.8

International Shipbuilding Progress Pub Date : 2021-07-07 DOI: 10.3233/isp-201000

A. Ebrahimi, P. O. Brett, S. O. Erikstad, B. Asbjørnslett, Jose Jorge Garcia Agis

引用次数: 1

Practical numerical method for erosion risk prediction on ship propellers 船舶螺旋桨侵蚀风险预测的实用数值方法

IF 0.8

International Shipbuilding Progress Pub Date : 2021-06-09 DOI: 10.3233/ISP-201002

K. Shin, P. Andersen

{"title":"Practical numerical method for erosion risk prediction on ship propellers","authors":"K. Shin, P. Andersen","doi":"10.3233/ISP-201002","DOIUrl":"https://doi.org/10.3233/ISP-201002","url":null,"abstract":"It is important to make predictions of cavitation-induced erosion risk on ship propellers in the design phase. Since a cavitation tunnel test on a propeller model coated by soft paint, that is, a standard experimental method for evaluating erosion risk, is costly and time-consuming, numerical methods are necessary for erosion risk predictions. DES is made for cavitating flows around the propeller with a numerically modelled hull wake at the inflow. After achieving a converged solution, an erosion risk index is computed in each cell connecting to the blade surface and accumulated over a propeller rotation. Cavitation simulations are made for two propellers designed for a single-screw ship, of which one showed an erosion indication and the other showed no indication after cavitation tunnel tests with soft paint coating. Three index formulations are compared with the experiment result. The high value region of Index 1 based on the potential energy density of collapsing bubbles corresponds better with the eroded spot indicated by partial and complete paint removals in the experiment than those of the other indices. The maximum value of Index 1 for the non-eroded propeller is lower by more than an order of magnitude than that for the eroded one, whereas the maximum values of the other indices are of the same order of magnitude for both propellers. The validation of Index 1 is in agreement with the criterion that the maximum index needs to be below 1,000 J/m3 for erosion-free propeller designs. The design evolution based on the erosion risk index and propulsive efficiency from CFD shows that it can be a practical tool for a quantitative evaluation of blade surface erosion risk in the propeller design phase.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/ISP-201002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47289939","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

Experimental and numerical assessment of vertical accelerations during bow re-entry of a RIB in irregular waves RIB在不规则波中返回船头时垂直加速度的实验和数值评估

IF 0.8

International Shipbuilding Progress Pub Date : 2021-06-02 DOI: 10.3233/ISP-201005

M. Eijk, P. Wellens

{"title":"Experimental and numerical assessment of vertical accelerations during bow re-entry of a RIB in irregular waves","authors":"M. Eijk, P. Wellens","doi":"10.3233/ISP-201005","DOIUrl":"https://doi.org/10.3233/ISP-201005","url":null,"abstract":"This paper presents the comparison of a self-conducted towing tank experiment with the simulation results of a calibrated state-of-the-art strip-theory method and a first-principles numerical method. The experiment concerns a Rigid Inflatable Boat (RIB) in moderate-to-high irregular waves. These waves result in bow emersion events of the RIB. Bow re-entry induces vertical accelerations which, in reality, can lead to severe injuries and structural damage. State-of-the-art methods for predicting the vertical acceleration levels are based on assumptions, require calibration and are often limited in application range. We demonstrate how the vertical acceleration as a function of time is found from a 3D numerical method based on the Navier–Stokes equations, employing the Volume of Fluid (VoF) method for the free surface, without any further assumptions or limitations. 2D+t strip theory methods like Fastship are based on the mechanics of wedges falling in water. The 3D numerical method that is part of the software ComFLOW is compared to previous research on falling wedges in 2D to investigate the effect of air and to find suitable grid distances for the 3D simulation of the RIB. The 3D RIB simulations are compared to Fastship and the experiment. With respect to the experiment, the ComFLOW simulations show a slight underestimation of the levels of heave and pitch. The underestimation of Fastship is larger. The prediction of acceleration in ComFLOW is hardly different from the experiment and a significant improvement with respect to Fastship. ComFLOW is demonstrated to predict acceleration levels better than before, which creates opportunities for using it in seakeeping optimization and for the improvement of methods like Fastship. The properties of the RIB and the experiment are available as open data at Wellens (2020).","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/ISP-201005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45165054","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: 1

Effect of stern appendages configurations on the course-keeping of ships in stern-quartering seas 船尾附属物构型对船尾停泊海域船舶航向保持的影响

IF 0.8

International Shipbuilding Progress Pub Date : 2021-06-02 DOI: 10.3233/ISP-201006

C. Lena, M. Bonci, F. Walree

{"title":"Effect of stern appendages configurations on the course-keeping of ships in stern-quartering seas","authors":"C. Lena, M. Bonci, F. Walree","doi":"10.3233/ISP-201006","DOIUrl":"https://doi.org/10.3233/ISP-201006","url":null,"abstract":"Ships can experience serious difficulties in keeping a straight course when sailing in stern-quartering seas. Design modifications like the addition of stern passive fins, or the modification of active control surfaces, are common solutions to improve the ship course-keeping. However, the success of such design modifications depends on the delicate balance between the excitation forces induced by the waves on the appended hull, the stabilization forces provided by the lifting surfaces as appended fins, and the steering forces provided by the control surfaces. This research investigates which of these aspects of a ship design play a concrete role in improving the ship course-keeping in waves. The study is carried out with the intention of looking at the different behaviors of the ship originating from different stern appendages configurations. Three modifications of stern appendages on three different ship hulls were investigated in various mild-to-rough sea conditions. The behavior of the vessels were simulated using a time domain, boundary element potential method, with the addition of semi-empirical formulations for the modelling of the stern lifting surfaces. The simulations were carried out in long crested irregular waves at three different direction, using the JONSWAP spectrum. The results showed that although larger stern appendages improve the directional stability of relatively large and slow vessels, in most cases they worsen their course-keeping ability, increasing the yaw motions. For smaller and faster vessels instead, passive and active fins tend to improve the course-keeping, because at high speed the lift provided by the appendages stabilizes the vessel. This effect is compensated by the wave excitation force at lower speed. Similarly to yaw, the roll motions increases with larger stern appendages.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/ISP-201006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47937626","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: 3

Dynamic positioning analysis and comfort assessment for the early design stage of large yachts 大型游艇早期设计阶段的动力定位分析与舒适性评价

IF 0.8

International Shipbuilding Progress Pub Date : 2021-06-01 DOI: 10.3233/ISP-210508

F. Mauro, Aron Benci, V. Ferrari, Enrico Della Valentina

{"title":"Dynamic positioning analysis and comfort assessment for the early design stage of large yachts","authors":"F. Mauro, Aron Benci, V. Ferrari, Enrico Della Valentina","doi":"10.3233/ISP-210508","DOIUrl":"https://doi.org/10.3233/ISP-210508","url":null,"abstract":"In some specific environmentally protected areas, conventional mooring systems cannot be used by large yachts for stationing at anchor and therefore, the adoption of a dynamic positioning system is required. It becomes then necessary to evaluate the station keeping capabilities of a yacht since the early-design stage. Adopting a quasi-static approach, it is possible to perform a standard capability analysis, as commonly done for the offshore industry, obtaining a capability plot as output. However, capability plots are referring to specific wind-wave correlation that are not covering all the possible wave combinations present in a sea area. Here, it is proposed to use a scatter diagram approach for the dynamic positioning analysis of a large yacht, considering the specific sea areas where the yacht shall operate, in order to figure out the downtime period of the DP system per each sea area. The proposed method can be coupled with traditional ship motions analysis, leading to a combination between comfort assessment and DP predictions. In the present work, use has been made of a traditional displacement yacht 72 m long, comparing five different DP system configurations and evaluating an enhanced comfort ranking combining ISO AWI-22834 guidelines for large yachts with ISO AWI-22822 DP analysis.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/ISP-210508","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42590570","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: 4

Pneumatic transport of bulk materials in construction of composite floating docks 复合浮船坞施工中散料的气动输送

IF 0.8

International Shipbuilding Progress Pub Date : 2021-03-16 DOI: 10.3233/ISP-209004

A. S. Rashkovskyi, A. V. Shchedrolosiev, V. M. Neiman, O. Kanash

引用次数: 0

How uncertainty influences decision-making effectiveness in conceptual ship design processes 不确定性如何影响船舶概念设计过程中的决策有效性

IF 0.8

International Shipbuilding Progress Pub Date : 2021-01-07 DOI: 10.3233/ISP-209003

Jose Jorge Garcia Agis, P. O. Brett, S. O. Erikstad

{"title":"How uncertainty influences decision-making effectiveness in conceptual ship design processes","authors":"Jose Jorge Garcia Agis, P. O. Brett, S. O. Erikstad","doi":"10.3233/ISP-209003","DOIUrl":"https://doi.org/10.3233/ISP-209003","url":null,"abstract":"BACKGROUND: Understanding how and why the development of conceptual ship designs sometimes become ineffective is essential for ship design firms. Our proposition is that in many projects, uncertainty influences negatively the effectiveness of the decision-making process. OBJECTIVE: The objective of this article is to quantify the perception of uncertainty in conceptual ship design processes. METHODS: In this article, we propose a research model to study such a phenomenon. The research model is tested using multivariate regression analysis, building on a survey conducted among 23 shipping companies. RESULTS: Our model suggests that 14% ( R 2 ) of the variability in the effectiveness of decision-making processes in ship design can be explained by changes in the perception of uncertainty. We can extract three interesting insights from this research work for the ship design practitioners as to how to improve the effectiveness of their design processes: (i) put more effort into the contextual factors affecting the ship design process, (ii) improve the communication with vessel owners and other stakeholders, and (iii) improve the agility of the design process. CONCLUSIONS: This study contributes to research on uncertainty in ship design processes by: (a) proposing an investigative model, (b) developing and testing a survey instrument and (c) running a multivariate regression analysis to study the effect of perceived uncertainty on the effectiveness of decision-making processes in conceptual ship design.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/ISP-209003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43354245","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