Pub Date : 2023-12-04DOI: 10.35219/annugalshipbuilding/2023.46.04
Carmen Gasparotti
The aim of the paper is to present the way in which the main risks that can lead to the pollution of the marine environment of the Black Sea can be ranked using multicriteria analysis, based on the AHP process (Analytic Hierarchy Process). This analysis represents a solid basis for the decision-making process. Based on this hierarchy, the decision-makers in the maritime field can easily visualize both the risk assessment criteria and the risks that must be taken into account. The analyzed risks (oil spills, shipwrecks, ship collision, fire explosion) in relation to the considered criteria (bad weather conditions, high-density traffic, human errors, ship age) have been ranked as follows: "ship collision" risk with overall priority = 0.366 is the one that must be considered the most dangerous in relation to the considered criteria, followed in descending order by the risk of "oil spills" with overall priority = 0.303, the risk of "shipwrecks" with overall priority = 0.181 and finally the risk of "fire explosion" with overall priority = 0.150.
{"title":"Ranking the main risks that can lead to the pollution of the marine environment in the Black Sea","authors":"Carmen Gasparotti","doi":"10.35219/annugalshipbuilding/2023.46.04","DOIUrl":"https://doi.org/10.35219/annugalshipbuilding/2023.46.04","url":null,"abstract":"The aim of the paper is to present the way in which the main risks that can lead to the pollution of the marine environment of the Black Sea can be ranked using multicriteria analysis, based on the AHP process (Analytic Hierarchy Process). This analysis represents a solid basis for the decision-making process. Based on this hierarchy, the decision-makers in the maritime field can easily visualize both the risk assessment criteria and the risks that must be taken into account. The analyzed risks (oil spills, shipwrecks, ship collision, fire explosion) in relation to the considered criteria (bad weather conditions, high-density traffic, human errors, ship age) have been ranked as follows: \"ship collision\" risk with overall priority = 0.366 is the one that must be considered the most dangerous in relation to the considered criteria, followed in descending order by the risk of \"oil spills\" with overall priority = 0.303, the risk of \"shipwrecks\" with overall priority = 0.181 and finally the risk of \"fire explosion\" with overall priority = 0.150.","PeriodicalId":504239,"journal":{"name":"Analele Universităţii \"Dunărea de Jos\" din Galaţi Fascicula XI Construcţii navale/ Annals of \"Dunărea de Jos\" of Galati Fascicle XI Shipbuilding","volume":"110 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139186746","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}
Pub Date : 2023-12-04DOI: 10.35219/annugalshipbuilding/2023.46.02
Florentin Daniel Popa, R. Bosoancă
Forecasting the hydrodynamic properties of a ship is crucial for assessing its maneuvering capabilities. This study presents the results of static drift and circular motion simulations conducted on a 37000 tdw chemical tanker. The calculations were carried out using the ISIS-CFD solver, accessible through the FineTM/Marine academic license provided by NUMECA. The flow solution was obtained by numerically solving the Reynolds-Averaged Navier Stokes equations, employing the k-ω Shear Stress Transport (SST) model to represent turbulence. The simulation results were used to determine the linear hydrodynamic derivatives, which were then compared with hydrodynamic derivatives estimated with empirical formulas proposed by Clarke et. al. [1] and Tribon Initial Design module in the absence of experimental results.
{"title":"Estimation of linear hydrodynamic derivatives of a 37000 tdw chemical tanker using virtual captive model tests","authors":"Florentin Daniel Popa, R. Bosoancă","doi":"10.35219/annugalshipbuilding/2023.46.02","DOIUrl":"https://doi.org/10.35219/annugalshipbuilding/2023.46.02","url":null,"abstract":"Forecasting the hydrodynamic properties of a ship is crucial for assessing its maneuvering capabilities. This study presents the results of static drift and circular motion simulations conducted on a 37000 tdw chemical tanker. The calculations were carried out using the ISIS-CFD solver, accessible through the FineTM/Marine academic license provided by NUMECA. The flow solution was obtained by numerically solving the Reynolds-Averaged Navier Stokes equations, employing the k-ω Shear Stress Transport (SST) model to represent turbulence. The simulation results were used to determine the linear hydrodynamic derivatives, which were then compared with hydrodynamic derivatives estimated with empirical formulas proposed by Clarke et. al. [1] and Tribon Initial Design module in the absence of experimental results.","PeriodicalId":504239,"journal":{"name":"Analele Universităţii \"Dunărea de Jos\" din Galaţi Fascicula XI Construcţii navale/ Annals of \"Dunărea de Jos\" of Galati Fascicle XI Shipbuilding","volume":"112 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139186718","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}
Pub Date : 2023-12-04DOI: 10.35219/annugalshipbuilding/2025.46.03
Alexandru Popa, Leonard Domnișoru
The objective of this study is to analyze the global structural strength of a pleasure yacht by advanced FEA approach. This is accomplished by developing and using a user FEMAP API script for equilibrating the FEA ship model, in calm water and sagging and hogging wave conditions, for different wave design heights, up to a maximum height of 6.5 meters. The FEA strength is assessed by yielding stress and buckling criteria.
本研究的目的是通过先进的有限元分析方法分析游艇的整体结构强度。为此，我们开发并使用了一个用户 FEMAP API 脚本，用于在平静水域、下陷波浪和迂回波浪条件下平衡有限元分析船舶模型，以适应不同的波浪设计高度，最大高度可达 6.5 米。通过屈服应力和屈曲标准对有限元强度进行评估。
{"title":"On advanced global strength analysis of a pleasure yacht by user’s procedures implemented in FEMAP / NX Nastran","authors":"Alexandru Popa, Leonard Domnișoru","doi":"10.35219/annugalshipbuilding/2025.46.03","DOIUrl":"https://doi.org/10.35219/annugalshipbuilding/2025.46.03","url":null,"abstract":"The objective of this study is to analyze the global structural strength of a pleasure yacht by advanced FEA approach. This is accomplished by developing and using a user FEMAP API script for equilibrating the FEA ship model, in calm water and sagging and hogging wave conditions, for different wave design heights, up to a maximum height of 6.5 meters. The FEA strength is assessed by yielding stress and buckling criteria.","PeriodicalId":504239,"journal":{"name":"Analele Universităţii \"Dunărea de Jos\" din Galaţi Fascicula XI Construcţii navale/ Annals of \"Dunărea de Jos\" of Galati Fascicle XI Shipbuilding","volume":"7 1-2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139186867","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}
Pub Date : 2023-12-04DOI: 10.35219/annugalshipbuilding/2023.46.01
Florentin Daniel Popa, R. Bosoancă
The maneuvering characteristics of ships represent complex phenomena, which includes their capacity for both maintaining a steady course and turning ability. There are no simple methods for evaluating a ship's performance in these aspects. Furthermore, the flow patterns connected to these phenomena are complex and frequently coupled with other factors. The purpose of this study is to evaluate the course keeping and turning performance for a 37000 tdw chemical tanker. Course-keeping is evaluated based on stability criteria, while empirical relations and numerical simulations using hydrodynamic derivatives from both empirical and computational fluid dynamics (CFD) methods are employed to analyse the turning circle and then compared with data from actual sea trials.
{"title":"A comparative analysis of course keeping and turning circle for a 37000 tdw chemical tanker","authors":"Florentin Daniel Popa, R. Bosoancă","doi":"10.35219/annugalshipbuilding/2023.46.01","DOIUrl":"https://doi.org/10.35219/annugalshipbuilding/2023.46.01","url":null,"abstract":"The maneuvering characteristics of ships represent complex phenomena, which includes their capacity for both maintaining a steady course and turning ability. There are no simple methods for evaluating a ship's performance in these aspects. Furthermore, the flow patterns connected to these phenomena are complex and frequently coupled with other factors. The purpose of this study is to evaluate the course keeping and turning performance for a 37000 tdw chemical tanker. Course-keeping is evaluated based on stability criteria, while empirical relations and numerical simulations using hydrodynamic derivatives from both empirical and computational fluid dynamics (CFD) methods are employed to analyse the turning circle and then compared with data from actual sea trials.","PeriodicalId":504239,"journal":{"name":"Analele Universităţii \"Dunărea de Jos\" din Galaţi Fascicula XI Construcţii navale/ Annals of \"Dunărea de Jos\" of Galati Fascicle XI Shipbuilding","volume":"78 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187169","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：