International Journal of Maritime Engineering最新文献_第4页

AN EXPERIMENTAL APPROACH TO THE CHALLENGES OF MISSION PLANNING FOR COLLABORATIVE MARITIME AUTONOMY 协作式海上自治任务规划挑战的实验方法

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-11-28 DOI: 10.5750/ijme.v164ia2.730

S. Turnock, Son Hoang, Steven J. Ossont, J. Downes, Joseph Lam, Ben Pritchard

{"title":"AN EXPERIMENTAL APPROACH TO THE CHALLENGES OF MISSION PLANNING FOR COLLABORATIVE MARITIME AUTONOMY","authors":"S. Turnock, Son Hoang, Steven J. Ossont, J. Downes, Joseph Lam, Ben Pritchard","doi":"10.5750/ijme.v164ia2.730","DOIUrl":"https://doi.org/10.5750/ijme.v164ia2.730","url":null,"abstract":"It is expected that a key part of a future with increasing use of maritime autonomous systems, will require collaborative and integrated approaches to working. How such approaches can be developed and tested was the focus of the Integrated Mission Management System 2019 (IMMS2019) project. The immediate objective was to experimentally demonstrate the ability of a single mission management system to control a fleet of heterogeneous, multi-domain autonomous platforms whereby their collaborative mission could be planned, verified, and delivered. To challenge the various spatial-temporal-energetic-communication-environmental constraints when operating such a fleet, real-world demonstration trials were carried out in Plymouth sound deployed from the Thales Maritime Autonomy Centre at Turnchapel Wharf. The trials were focussed on providing essential information into how such collaborations can be best executed, alongside invaluable lessons as to how existing platforms need to enhance their interoperability and in particular, robustness of communications and mission plans.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48859442","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}

引用次数: 0

Uncertainty Of Ship Hull Girder Ultimate Strength in Longitudinal Bending 船体梁纵向弯曲极限强度的不确定性

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-11-28 DOI: 10.5750/ijme.v164ia2.1157

Shen Li, Do Kyun Kim, J. Ringsberg, B. Liu, S. Benson

{"title":"Uncertainty Of Ship Hull Girder Ultimate Strength in Longitudinal Bending","authors":"Shen Li, Do Kyun Kim, J. Ringsberg, B. Liu, S. Benson","doi":"10.5750/ijme.v164ia2.1157","DOIUrl":"https://doi.org/10.5750/ijme.v164ia2.1157","url":null,"abstract":"The engineering modelling of ship hull girder strength usually consists of global and local levels. The Smith-type progressive collapse method is a typical example of this kind, in which the global model requires input from the local model with the underpinning local structural behaviour, i.e., load-shortening curve (LSC). However, the modelling is prone to uncertainty due to the statistical variability of the basic variables (aleatoric uncertainty) and the inadequacy of engineering models in both global and local levels (epistemic uncertainty). The former can be well tackled by a probabilistic sampling, whereas dealing with the latter for ship hull girder strength lacks an established approach. There can be different sources of epistemic uncertainty. In the modelling of ship hull girder strength, this may be partially manifested as that caused by different choices of local engineering models for predicting the LSC. In the light of this, a probabilistic method is applied in this research to investigate and quantify the uncertainty related to the local models. The adopted approach is a hybrid method incorporating the Smith-type progressive collapse method with Monte-Carlo Simulation and an adaptable LSC algorithm. Case studies on four merchant ships show that the ultimate strength in sagging is subjected to the most significant computational uncertainty as compared with those in hogging and horizontal bending. In a bi-axial load case, the computational uncertainty estimated for vertical bending will be counteracted as the horizontal bending increases. Nevertheless, this change is not directly proportional to the bi-axial load component ratio and appreciably varies between different ship types. The insights and data provided by this study may eventually resolve the epistemic uncertainty in the modelling of ship hull girder strength. It would also be useful to improve the ultimate limit state-based reliability analysis with regards to the strength model uncertainty evaluation.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44480718","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}

引用次数: 0

EVALUATION OF THE EFFECTS OF INDUSTRY 4.0 ON THE MARITIME SECTOR WITH FUZZY AHP – VIKOR HYBRID METHOD 用模糊ahp - vikor混合方法评价工业4.0对海事部门的影响

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-11-28 DOI: 10.5750/ijme.v164ia2.778

M. Mollaoğlu, H. Demirel, A. Balin

引用次数: 1

EXPERIMENTAL CHARACTERIZATION OF THE STRENGTH OF HAND-LAMINATED AND VACUUM BAGGED QUASI-ISOTROPIC GLASS-EPOXY COMPOSITES AGAISNT THE ISO 12215-5 手工层压和真空袋装准各向同性玻璃环氧复合材料强度的实验表征

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-11-28 DOI: 10.5750/ijme.v164ia2.1178

Jean-Baptiste R. G. Souppez, Juli Laci

{"title":"EXPERIMENTAL CHARACTERIZATION OF THE STRENGTH OF HAND-LAMINATED AND VACUUM BAGGED QUASI-ISOTROPIC GLASS-EPOXY COMPOSITES AGAISNT THE ISO 12215-5","authors":"Jean-Baptiste R. G. Souppez, Juli Laci","doi":"10.5750/ijme.v164ia2.1178","DOIUrl":"https://doi.org/10.5750/ijme.v164ia2.1178","url":null,"abstract":"Glass fibre reinforced polymer composites are the most common materials employed for the manufacturing of small crafts. Their hull construction and scantlings are governed by the ISO 12215-5. The latest version of the standard introduced a new methodology to assess the ultimate strength of composites laminates. The regression equations based on the fibre weight fraction of the former version have been replaced by a more detailed ply-by-ply analysis. However, no validation data is available to ascertain the relevance of the default ultimate strengths provided by the ISO 12215-5:2019. This paper employs destructive testing to experimentally characterize the ultimate flexural, tensile and compressive strength of a quasi-isotropic glass-epoxy laminate. Experiments were undertaken in accordance with the ISO 178 for flexural properties, the ISO 527-4 for tensile properties, and the ISO 14126 for compressive properties. Two manufacturing techniques are investigated, namely hand lamination and vacuum bagging. The former represents a cheaper and therefore more common manufacturing option, while the latter is representative of an advanced manufacturing process. The key results show that the ISO 12215-5:2019 default ultimate strengths for the quasi-isotropic composite laminate tested are (i) conservative for the ultimate flexural strength, (ii) appropriate for the ultimate tensile strength, and (iii) optimistic for the ultimate compressive strength, especially for vacuum bagged samples, with the main cause identified as the value of the ultimate compressive breaking strain for chopped strand mat. These findings provide validation data for the ISO12215-5:2019. They may inform designers, compliance assessors and policy makers in the selection of relevant factors of safety for composite structures, and it is anticipated the results may contribute to future improvements in small craft regulations.","PeriodicalId":50313,"journal":{"name":"International Journal of Maritime Engineering","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44785665","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}

引用次数: 1

Smart Technology Applied in The Management of Yachting Marinas 智能技术在游艇船员管理中的应用

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-06-15 DOI: 10.5750/ijme.v164i1.816

Ana B. Radulovic

引用次数: 0

Ice Sensing Technologies with Applications in Augmented Situational Awareness 结冰传感技术及其在增强态势感知中的应用

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-06-15 DOI: 10.5750/ijme.v164i1.18

M. Garvin

引用次数: 0

Free Surface Effect on the Hydrodynamics of an Underwater Vehicle Hullform, the Darpa Suboff 自由表面对水下航行器壳体流体力学的影响，Darpa subboff

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-06-15 DOI: 10.5750/ijme.v164i1.732

X. Ling, Z. Leong, C. Chin, M. Woodward

引用次数: 3

Fault Analysis of Ship Machinery Using Machine Learning Techniques 基于机器学习技术的船舶机械故障分析

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-06-15 DOI: 10.5750/ijme.v164i1.769

Funda Kaya İnceişçi, A. Ak

{"title":"Fault Analysis of Ship Machinery Using Machine Learning Techniques","authors":"Funda Kaya İnceişçi, A. Ak","doi":"10.5750/ijme.v164i1.769","DOIUrl":"https://doi.org/10.5750/ijme.v164i1.769","url":null,"abstract":"Maintenance and repair of ship systems and prediction of fault probability have become an important issue for dynamic ship systems recently. Increasing the usability of systems by detecting the fault analysis is one of the current work areas. In recent years, the rapid development of information technologies and the machine learning approaches developing accordingly have made it possible to integrate machine learning techniques into ship systems. The use of machine learning in the studies has enabled this method to be tested in the areas of maintenance, repair, and fault analysis. To be able to predict the fault that may occur in the ship machinery systems and prevent the fault accordingly, can increase the lifespan of ship machinery's. In this study, the data obtained from an LM-2500 type ship engine were analyzed by regression and Artificial Neural Networks (ANN) algorithms to predict the fault of ship machinery. The results were compared for linear regression, decision tree regression, k nearest neighbours’ regression, random forest regression, bayesian ridge regression, extra tree regression, linear SVR regression and ANN algorithms. As a result of the analysis, it was revealed that the ANN method gave better results in machine fault prediction compared to the regression methods. ","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":"43978662","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}

引用次数: 1

Numerical Validation of the Hydrodynamic Drag of a Surfaced and Fully Appended Underwater Vehicle 水面全附加水下航行器水动力阻力的数值验证

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-06-15 DOI: 10.5750/ijme.v164i1.24

Mathieu Courdier, Z. Leong, J. Duffy, J. Binns, A. Conway

引用次数: 0

Fatigue Estimation on a High-Speed Wave Piercing Catamaran During Normal Operations 高速穿波双体船正常运行疲劳评估

IF 0.4 4区工程技术

International Journal of Maritime Engineering Pub Date : 2022-06-15 DOI: 10.5750/ijme.v164i1.736

M. Warren, J. Ali-Lavroff, J. McVicar, T. Magoga, B. Shabani, D. Holloway, G. Thomas

{"title":"Fatigue Estimation on a High-Speed Wave Piercing Catamaran During Normal Operations","authors":"M. Warren, J. Ali-Lavroff, J. McVicar, T. Magoga, B. Shabani, D. Holloway, G. Thomas","doi":"10.5750/ijme.v164i1.736","DOIUrl":"https://doi.org/10.5750/ijme.v164i1.736","url":null,"abstract":"The estimation of fatigue life in the design process is particularly important for weight-optimised ships such as high-speed aluminium craft, but to date no research has been published on the fatigue accumulation on large wave-piercing catamarans, focusing on long-term operations. This paper assesses the applicability of classification society rules for high-speed catamarans with respect to fatigue design. This was achieved by comparing the long-term distributions of stress, measured on a 111m long wave-piercing catamaran ferry whilst operating in the Canary Islands and during the delivery voyage, with load spectra estimated using a method accepted by the classification society, DNV. The paper also proposes an improved distribution fitment method for fatigue analysis. A detailed method to convert measured stress histories in the time domain into an appropriate stress-spectrum and fitment of Weibull parameters is presented. Results show that the simplified method accepted by the classification society is highly conservative regarding fatigue estimation compared to fatigue results based on measured data. The proposed combined Weibull fitment method substantially improves the accuracy of simplified fatigue analysis methods.","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":"42671418","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}

引用次数: 3