The main aim of this study is to measure the MWL of the operators according to the increasing workload during simulated ship navigation and it is aimed to contribute to the clarification of upper redline of task demands. Eye responses and performance results of 12 participants were recorded during the measurements carried out in bridge simulator. In addition, NASA-TLX was used for 12 participants at the end of each step of the scenarios. The results showed that MWL of the participants increased as the task load increased and their performance decreased. It has been observed that the developed ANN model can predict the MWL based on eye response indices (accuracy: 79.2%). The results of this study also showed that the task demand, whose upper red line became apparent, drew a set of projections and possibilities in which navigation conditions could not be performed by a single operator.
{"title":"Mental Workload (MWL) Measurement of Officers in Simulated Ship Navigation; Determining the Redlines of Performance","authors":"Barış Özsever, Leyla Tavacioglu","doi":"10.5750/ijme.v164i1.727","DOIUrl":"https://doi.org/10.5750/ijme.v164i1.727","url":null,"abstract":"The main aim of this study is to measure the MWL of the operators according to the increasing workload during simulated ship navigation and it is aimed to contribute to the clarification of upper redline of task demands. Eye responses and performance results of 12 participants were recorded during the measurements carried out in bridge simulator. In addition, NASA-TLX was used for 12 participants at the end of each step of the scenarios. The results showed that MWL of the participants increased as the task load increased and their performance decreased. It has been observed that the developed ANN model can predict the MWL based on eye response indices (accuracy: 79.2%). The results of this study also showed that the task demand, whose upper red line became apparent, drew a set of projections and possibilities in which navigation conditions could not be performed by a single operator.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46100050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.1184
C. S. Fışkın, A. Cerit
Developing accurate forecasting models provides the capability of handling the uncertain, volatile, and complex nature of the shipping industry. The outcome of the forecasts directly affects the decisions of policymakers. In this case, numerous forecasting studies have been published over time and rapid development has been evolved to reach accurate forecasts. This paper reviews both analytical and empirical studies by categorizing forecasting themes for shipping. The focus is threefold: to examine the developed forecasting models, to analyse the employed specific features and to evaluate the data characteristics, used variables, forecasting methods and models, and model features. Furthermore, a future agenda and implications to the industry are proposed. The findings are considered to provide information that is useful for researchers and practitioners who are involved in the forecasting process of the shipping industry.
{"title":"Which Forecasting Models Are Employed in The Shipping Industry? Identifying Key Themes and Future Directions Through an Integrative Review","authors":"C. S. Fışkın, A. Cerit","doi":"10.5750/ijme.v163ia4.1184","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.1184","url":null,"abstract":"Developing accurate forecasting models provides the capability of handling the uncertain, volatile, and complex nature of the shipping industry. The outcome of the forecasts directly affects the decisions of policymakers. In this case, numerous forecasting studies have been published over time and rapid development has been evolved to reach accurate forecasts. This paper reviews both analytical and empirical studies by categorizing forecasting themes for shipping. The focus is threefold: to examine the developed forecasting models, to analyse the employed specific features and to evaluate the data characteristics, used variables, forecasting methods and models, and model features. Furthermore, a future agenda and implications to the industry are proposed. The findings are considered to provide information that is useful for researchers and practitioners who are involved in the forecasting process of the shipping industry.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47214745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The box girder is an important structure which is widely used in the ship and marine engineering but has not extensively investigated fracture problem. The paper adopts the stress intensity factor (SIF) as the crack tip parameter to carry out the mixed mode fracture assessment of the box girder structure with crack damage. The bending load, torsion load and side load are firstly introduced to study box girder crack propagation. And the related influencing factors of crack length, crack type, combined loads, etc. are investigated emphatically. In analysis, crack growth angle is also analyzed to evaluate the crack growth. The results show that different load types have different contributions to crack propagation. And combined bending and torsion loads effect may be considered adopting a linear superposition principle under transverse cracks and larger angle cracks. When the side load is added, the area near the crack upper surface will be easy to occur unstable expansion. These conclusions will provide a guiding significance to evaluate the crack propagation of box girder.
{"title":"Mixed Mode Fracture Assessment for Box Girder with Crack Damage under Combined Loads","authors":"Ziya Peng, P. Yang, Yuelin Song, K. Hu","doi":"10.5750/ijme.v163ia4.26","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.26","url":null,"abstract":"The box girder is an important structure which is widely used in the ship and marine engineering but has not extensively investigated fracture problem. The paper adopts the stress intensity factor (SIF) as the crack tip parameter to carry out the mixed mode fracture assessment of the box girder structure with crack damage. The bending load, torsion load and side load are firstly introduced to study box girder crack propagation. And the related influencing factors of crack length, crack type, combined loads, etc. are investigated emphatically. In analysis, crack growth angle is also analyzed to evaluate the crack growth. The results show that different load types have different contributions to crack propagation. And combined bending and torsion loads effect may be considered adopting a linear superposition principle under transverse cracks and larger angle cracks. When the side load is added, the area near the crack upper surface will be easy to occur unstable expansion. These conclusions will provide a guiding significance to evaluate the crack propagation of box girder.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43541550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.735
Erik Scherpenhuijsen Rom, Naomi De Haan, Deborah Noffke, Danique Horstmeier, Matthew De Haas, A. Kana, I. Akkerman, Andrew Irvin, P. Nuttall
This paper provides an evaluation on the suitability of the Greenheart Project vessel design for the Pacific Islands and proposes adaptations for an improved design that is specifically tailored to an updated set of requirements. The Greenheart Project vessel design was developed by an open-source design process and is part of an initiative to develop zero-emission sail and solar ships for remote island locations. The original vessel design stands unaltered since 2014 and the design has now been tested against an updated set of client requirements which were developed in cooperation with local stakeholders. Proposed adaptations to the design are described and an alternative design is proposed that specifically matches with the proposed client requirements. Three types of requirements are developed and discussed: technical, operational, and economic. The research results in adaptations which are integrated into a final design. This paper discusses the evaluation of the Greenheart Project, the considered adaptations and elaborates specifically on the propulsion system.
{"title":"Evaluation and Adaptions to the Greenheart Project zero-emission vessel for service in the Pacific Islands","authors":"Erik Scherpenhuijsen Rom, Naomi De Haan, Deborah Noffke, Danique Horstmeier, Matthew De Haas, A. Kana, I. Akkerman, Andrew Irvin, P. Nuttall","doi":"10.5750/ijme.v163ia4.735","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.735","url":null,"abstract":"This paper provides an evaluation on the suitability of the Greenheart Project vessel design for the Pacific Islands and proposes adaptations for an improved design that is specifically tailored to an updated set of requirements. The Greenheart Project vessel design was developed by an open-source design process and is part of an initiative to develop zero-emission sail and solar ships for remote island locations. The original vessel design stands unaltered since 2014 and the design has now been tested against an updated set of client requirements which were developed in cooperation with local stakeholders. Proposed adaptations to the design are described and an alternative design is proposed that specifically matches with the proposed client requirements. Three types of requirements are developed and discussed: technical, operational, and economic. The research results in adaptations which are integrated into a final design. This paper discusses the evaluation of the Greenheart Project, the considered adaptations and elaborates specifically on the propulsion system. ","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47609626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Kim, M. P. Mujeeb-Ahmed, José Manuel Cabrera Miranda, J. Paik
The aim of this study is to establish an innovative method for predicting wave-induced hull girder loads acting on ship-shaped offshore installations. Unlike in trading ships, the determination of hull girder loads of ship-shaped offshore installations must consider site-specific environmental conditions. However, the accurate determination of wave-induced loads is not straightforward owing to uncertainties in the ocean environmental conditions and location-dependent complexities, among other factors. This study proposes a probabilistic approach to determine the site-specific design values of wave-induced loads acting on ship-shaped offshore installations that also accounts for the effects of mooring system type. Six target regions – the North Sea, Gulf of Mexico, western coast of Africa, the eastern coast of South America, southeastern coast of Asia and northwestern coast of Australia – were studied to compare the results corresponding to various sea states. A set of wave scenarios representing all possible wave events for each target region were selected using the Latin hypercube sampling technique. To demonstrate this method, the design values of the wave-induced vertical bending moments were determined for a very large crude oil carrier (VLCC)-class structure with a hypothetical floating, production, storage and offloading (FPSO) unit. The effects of the mooring system type (e.g., single-point mooring versus spread mooring) on the wave-induced hull girder loads of the ship-shaped offshore installations were also evaluated. The validation of the developed method was made by comparison with existing results in the literature, its novelty is associated with a new methodology that can accurately determine wave-induced hull girder loads of ship-shaped offshore installations taking into account the effects of site-specific ocean environmental conditions and mooring system type, and its main contribution to the industry is to provide core technology for the safe and economical design of ship-shaped offshore hull structures.
{"title":"A New Method for Predicting Site-Specific Wave-Induced Hull Girder Loads Acting on Ship-Shaped Offshore Installations in Benign Conditions","authors":"H. Kim, M. P. Mujeeb-Ahmed, José Manuel Cabrera Miranda, J. Paik","doi":"10.5750/ijme.v163ia4.14","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.14","url":null,"abstract":"The aim of this study is to establish an innovative method for predicting wave-induced hull girder loads acting on ship-shaped offshore installations. Unlike in trading ships, the determination of hull girder loads of ship-shaped offshore installations must consider site-specific environmental conditions. However, the accurate determination of wave-induced loads is not straightforward owing to uncertainties in the ocean environmental conditions and location-dependent complexities, among other factors. This study proposes a probabilistic approach to determine the site-specific design values of wave-induced loads acting on ship-shaped offshore installations that also accounts for the effects of mooring system type. Six target regions – the North Sea, Gulf of Mexico, western coast of Africa, the eastern coast of South America, southeastern coast of Asia and northwestern coast of Australia – were studied to compare the results corresponding to various sea states. A set of wave scenarios representing all possible wave events for each target region were selected using the Latin hypercube sampling technique. To demonstrate this method, the design values of the wave-induced vertical bending moments were determined for a very large crude oil carrier (VLCC)-class structure with a hypothetical floating, production, storage and offloading (FPSO) unit. The effects of the mooring system type (e.g., single-point mooring versus spread mooring) on the wave-induced hull girder loads of the ship-shaped offshore installations were also evaluated. The validation of the developed method was made by comparison with existing results in the literature, its novelty is associated with a new methodology that can accurately determine wave-induced hull girder loads of ship-shaped offshore installations taking into account the effects of site-specific ocean environmental conditions and mooring system type, and its main contribution to the industry is to provide core technology for the safe and economical design of ship-shaped offshore hull structures.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42332792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.719
M. Gandomkar, Mehrshad Moshref-javadi
Transfer skirt (TS) is a structure with spherical asymmetric sectors, which is connected to a rescue submarine and used to transfer crew between two submarines in the depth of the sea. When this structure is connected to the disabled submarine in deep, it is under violent stresses that when repeated, cause fatigue damage at sensitive regions such as welded joints. In this article, based on the Paris crack growth equation and fracture mechanics criteria in BS 7910 standard, a code is developed, by which the fatigue life of the transfer skirt structure containing various initial crack sizes is evaluated. Stress analysis is performed in order to acquire the stress distribution and to determine the stress concentration spots at the welded joints. At last, regarding the relationship between crack length and prospected life under various conditions, the minimum resolution required for examination instruments to identify defects in the welds is resolved. It seems that a permissible size of an initial crack in the welds of a transfer skirt enduring 50000 fatigue cycles is the utmost 0.65mm.
{"title":"The Crack Resolution Required to Ensure Fatigue Life of a Rescue Submarine’s Transfer Skirt","authors":"M. Gandomkar, Mehrshad Moshref-javadi","doi":"10.5750/ijme.v163ia4.719","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.719","url":null,"abstract":"Transfer skirt (TS) is a structure with spherical asymmetric sectors, which is connected to a rescue submarine and used to transfer crew between two submarines in the depth of the sea. When this structure is connected to the disabled submarine in deep, it is under violent stresses that when repeated, cause fatigue damage at sensitive regions such as welded joints. In this article, based on the Paris crack growth equation and fracture mechanics criteria in BS 7910 standard, a code is developed, by which the fatigue life of the transfer skirt structure containing various initial crack sizes is evaluated. Stress analysis is performed in order to acquire the stress distribution and to determine the stress concentration spots at the welded joints. At last, regarding the relationship between crack length and prospected life under various conditions, the minimum resolution required for examination instruments to identify defects in the welds is resolved. It seems that a permissible size of an initial crack in the welds of a transfer skirt enduring 50000 fatigue cycles is the utmost 0.65mm.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47224091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.745
J. Ding, Chu-Ting Hsu, Ming-Tao Chou, Yao Lin Ong
To ensure the best possible integrated logistics service performance, how to select an international ocean freight logistics provider (IOFLP) suitable for shippers is an important issue. The main purpose of this paper is to construct a qualitative-quantitative fuzzy multiple criteria decision-making (MCDM) evaluation model to empirically select an optimal IOFLP. After reviewing the literature and gathering experts' opinions, 23 criteria in five assessment aspects suitable for the selection of an IOFLP were obtained. The study then constructed a fuzzy MCDM selection model based on quantitative-qualitative criteria, and conducted a questionnaire survey of import/export shippers in Taiwan in order to interpret the operating processes of the proposed model. The empirical results indicated that company P was the IOFLP considered optimal by the shippers in Taiwan. Moreover, the proposed qualitative-quantitative fuzzy MCDM method and research methodology in this study can be employed as a practical tool for business applications in the future.
{"title":"A Qualitative-Quantitative Fuzzy Evaluation Model for Selecting an International Ocean Freight Logistics Provider","authors":"J. Ding, Chu-Ting Hsu, Ming-Tao Chou, Yao Lin Ong","doi":"10.5750/ijme.v163ia4.745","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.745","url":null,"abstract":"To ensure the best possible integrated logistics service performance, how to select an international ocean freight logistics provider (IOFLP) suitable for shippers is an important issue. The main purpose of this paper is to construct a qualitative-quantitative fuzzy multiple criteria decision-making (MCDM) evaluation model to empirically select an optimal IOFLP. After reviewing the literature and gathering experts' opinions, 23 criteria in five assessment aspects suitable for the selection of an IOFLP were obtained. The study then constructed a fuzzy MCDM selection model based on quantitative-qualitative criteria, and conducted a questionnaire survey of import/export shippers in Taiwan in order to interpret the operating processes of the proposed model. The empirical results indicated that company P was the IOFLP considered optimal by the shippers in Taiwan. Moreover, the proposed qualitative-quantitative fuzzy MCDM method and research methodology in this study can be employed as a practical tool for business applications in the future.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46445233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.781
C. Leontopoulos, Charalambos Mouzakis, Petrolekas Michail
A fully functional prototype sensor has been developed to provide new insights into vessel shaftline dynamics that introduces real time data collection and performance evaluation. The Smart Bearing Sensor was recently tested onboard a large container vessel and was shown to work with promising results. The sensor is based on strain gauge technology and has been shown to enable continuous measurement of the bearing reaction load through the strain induced onto the bearing housing by the shaft. Given the capability of continuous monitoring and recording of the bearing reaction load and shaft misalignment angle, the prototype sensor removes the need for jack-up tests for re-alignment purposes. It is envisaged that this system will allow for the earliest possible diagnosis of shaft alignment-related problems, such as bearing unloading, bearing overloading or excessive shaft-bearing misalignment. The prototype sensor could be incorporated into a marine condition monitoring system that provides a more timely warning against bearing failures, particularly when compared to bearing temperature sensor indications.
{"title":"Shaft Alignment Self-Diagnosis Using the Smart Bearing Sensor","authors":"C. Leontopoulos, Charalambos Mouzakis, Petrolekas Michail","doi":"10.5750/ijme.v163ia4.781","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.781","url":null,"abstract":"A fully functional prototype sensor has been developed to provide new insights into vessel shaftline dynamics that introduces real time data collection and performance evaluation. The Smart Bearing Sensor was recently tested onboard a large container vessel and was shown to work with promising results. The sensor is based on strain gauge technology and has been shown to enable continuous measurement of the bearing reaction load through the strain induced onto the bearing housing by the shaft. Given the capability of continuous monitoring and recording of the bearing reaction load and shaft misalignment angle, the prototype sensor removes the need for jack-up tests for re-alignment purposes. It is envisaged that this system will allow for the earliest possible diagnosis of shaft alignment-related problems, such as bearing unloading, bearing overloading or excessive shaft-bearing misalignment. The prototype sensor could be incorporated into a marine condition monitoring system that provides a more timely warning against bearing failures, particularly when compared to bearing temperature sensor indications.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70951709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.794
Kenneth Fisher
Shipyard projects involving ship construction, repair, conversion and modification, along with the associated design processes, involve a wide variety of contracts. Almost always multiple contracts are part of each shipyard project. Disputes often arise when potential risks within the accomplishment of the project were not adequately addressed within the project’s contracts. Also, inconsistencies between related contracts often are the core reason for disputes. The management of projects under such circumstances constitutes a significant challenge to the success of the project. This paper identifies many of those potential risks to assist in addressing them in the contracts before the project commences.
{"title":"Challenges of Managing Shipyard Projects","authors":"Kenneth Fisher","doi":"10.5750/ijme.v163ia4.794","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.794","url":null,"abstract":"Shipyard projects involving ship construction, repair, conversion and modification, along with the associated design processes, involve a wide variety of contracts. Almost always multiple contracts are part of each shipyard project. Disputes often arise when potential risks within the accomplishment of the project were not adequately addressed within the project’s contracts. Also, inconsistencies between related contracts often are the core reason for disputes. The management of projects under such circumstances constitutes a significant challenge to the success of the project. This paper identifies many of those potential risks to assist in addressing them in the contracts before the project commences.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46885992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-07DOI: 10.5750/ijme.v163ia4.1185
V. Capizzi, R. Marian
This paper presents a development of a novel, efficient, and robust tool to conduct evacuation from maritime ships using multi-commodity network theory and graph search techniques. MSC/1533 (IMO, 2016) presents guidelines to conduct simplified/quasi-advanced analysis methods for the evacuation analysis of ships. The IMO techniques describe a prescriptive approach and don’t consider path variabilities or uncertainties associated with the dynamic nature of the evacuation environment. To enhance the work presented by the IMO, a linear programming multi-commodity graphing solution has been developed and implemented in Excel. This model is based on network and graph theory and specifies basic passenger characteristics, simulates ships geometry and specifies path constraints. The simulation determines the shortest route to the nearest safe point/muster station. Monte Carlo is used to characterise model uncertainties in the simulation. Initial experiments indicate this technique is feasible. As a Systems Engineering tool, it can be used in trade-off studies to finalise ship layout design and identify path delay/choke points and can be used to rank evacuation performance of existing ship configurations.
{"title":"A Stochastic Network Approach to Modelling Ship Evacuation","authors":"V. Capizzi, R. Marian","doi":"10.5750/ijme.v163ia4.1185","DOIUrl":"https://doi.org/10.5750/ijme.v163ia4.1185","url":null,"abstract":"This paper presents a development of a novel, efficient, and robust tool to conduct evacuation from maritime ships using multi-commodity network theory and graph search techniques. MSC/1533 (IMO, 2016) presents guidelines to conduct simplified/quasi-advanced analysis methods for the evacuation analysis of ships. The IMO techniques describe a prescriptive approach and don’t consider path variabilities or uncertainties associated with the dynamic nature of the evacuation environment. To enhance the work presented by the IMO, a linear programming multi-commodity graphing solution has been developed and implemented in Excel. This model is based on network and graph theory and specifies basic passenger characteristics, simulates ships geometry and specifies path constraints. The simulation determines the shortest route to the nearest safe point/muster station. Monte Carlo is used to characterise model uncertainties in the simulation. Initial experiments indicate this technique is feasible. As a Systems Engineering tool, it can be used in trade-off studies to finalise ship layout design and identify path delay/choke points and can be used to rank evacuation performance of existing ship configurations. ","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48828044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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