International Shipbuilding Progress最新文献_第2页

Hydrodynamic hull form optimization of a single trawler based on full parametric modeling 基于全参数化建模的单拖网渔船水动力船体形状优化

IF 0.8

International Shipbuilding Progress Pub Date : 2022-12-02 DOI: 10.3233/isp-220006

Wu Hao, Lu Cong Hong, Liu Qiang, Yu Xin, Fan Wei, Peng Bi Ye

{"title":"Hydrodynamic hull form optimization of a single trawler based on full parametric modeling","authors":"Wu Hao, Lu Cong Hong, Liu Qiang, Yu Xin, Fan Wei, Peng Bi Ye","doi":"10.3233/isp-220006","DOIUrl":"https://doi.org/10.3233/isp-220006","url":null,"abstract":"Background: The green ship technologies are gaining in importance in diverse areas of ship design. Objective: To explore the energy-saving and environmentally friendly ship during the primary ship designs stage. Methods: A hull form optimization method based on the full parametric modeling is proposed, in which the Computational Fluid Dynamic (CFD) analysis is integrated, and the algorithms of Sobol and NSGA-II are used. Taking a 674 m3 single trawler as an example, the full parametric modeling of forebody hull form is adopted by employing an F-spline curve with the software CAESES and the total resistance of the full-scale ship is computed by the integrated software SHIPFLOW numerically. Results: It is proved that the presented optimization method can engage well in the automation process of the hull form design under the constraints of displacement and longitudinal center of buoyancy. Compared with the initial hull form, the total resistance of the optimal ship at the design speed of 11.5 kn decreases 12.2%. Conclusions: It indicates that the proposed method of hull form optimization based on full parametric modeling proposed in this paper has better engineering applicability and broad application prospect in practical ship design practices.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48627150","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 reduced order model for FSI of tank walls subject to wave impacts during sloshing 晃动过程中波浪作用下罐壁FSI的降阶模型

IF 0.8

International Shipbuilding Progress Pub Date : 2022-11-23 DOI: 10.3233/isp-220003

R. W. Bos, M. van der Eijk, J.H. den Besten, P. Wellens

{"title":"A reduced order model for FSI of tank walls subject to wave impacts during sloshing","authors":"R. W. Bos, M. van der Eijk, J.H. den Besten, P. Wellens","doi":"10.3233/isp-220003","DOIUrl":"https://doi.org/10.3233/isp-220003","url":null,"abstract":"Loads due to wave impacts are a limiting factor in the design of liquefied natural gas (LNG) tankers and their insulation. The current methodology considers the load independent from the response of the tank. Better tanks can be designed by knowing the effect of the interaction between the wave loads and the response, however predicting these effects is computationally expensive. In this paper a new application of the non-hydrostatic shallow water equations are presented, namely as a reduced order model (ROM) for fluid structure interaction for wave impacts. Our ROM is compared to a high fidelity model. The proposed ROM is fast and accurately predicts the total impulse and added mass, and therefore the general behaviour of the structure during the free vibration phase. It does however not always accurately predict the maximum force. It is therefore considered an appropriate tool for a first screening of the loads for which fluid-structure interaction is important, after which a more accurate method can be used to evaluate the most interesting cases. A sensitivity study is performed for various impact angles and velocities, showing that the importance of fluid structure interaction depends highly on the specific situation.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48296686","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

Application of a maritime CFD code to a benchmark problem for non-Newtonian fluids: the flow around a sphere 海洋CFD代码在非牛顿流体基准问题中的应用：球体周围的流动

IF 0.8

International Shipbuilding Progress Pub Date : 2022-07-11 DOI: 10.3233/isp-220002

Stefano Lovato, S. Toxopeus, J. Settels, G. Keetels

{"title":"Application of a maritime CFD code to a benchmark problem for non-Newtonian fluids: the flow around a sphere","authors":"Stefano Lovato, S. Toxopeus, J. Settels, G. Keetels","doi":"10.3233/isp-220002","DOIUrl":"https://doi.org/10.3233/isp-220002","url":null,"abstract":"The ship’s resistance and manoeuvrability in shallow waters can be adversely influenced by the presence of fluid mud layers on the seabed of ports and waterways. Fluid mud exhibits a complex non-Newtonian rheology that is often described using the Herschel–Bulkley model. The latter has been recently implemented in a maritime finite-volume CFD code to study the manoeuvrability of ships in the presence of muddy seabeds. In this paper, we explore the accuracy and robustness of the CFD code in simulating the flow of Herschel–Bulkley fluids, including power-law, Bingham and Newtonian fluids as particular cases. As a stepping stone towards the final maritime applications, the study is carried out on a classic benchmark problem in non-Newtonian fluid mechanics: the laminar flow around a sphere. The aim is to test the performance of the non-Newtonian solver before applying it to the more complex scenarios. Present results could also be used as reference data for future testing. Flow simulations are carried out at low Reynolds numbers in order to compare our results with an extensive collection of data from the literature. Results agree both qualitatively and quantitatively with literature. Difficulties in the convergence of the iterative solver emerged when simulating Bingham and Herschel–Bulkley flows. A simple change in the interpolation of the apparent viscosity has mitigated such difficulties. The results of this work, combined with our previous code verification exercises, suggest that the non-Newtonian solver works as intended and it can be thus employed on more complex applications.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47667810","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

An experimental study on added resistance focused on the effects of bow wave breaking and relative wave measurements 对附加阻力进行了实验研究，重点研究了船首波破碎和相对波测量对附加阻力的影响

IF 0.8

International Shipbuilding Progress Pub Date : 2022-06-14 DOI: 10.3233/isp-210018

Vera Hengelmolen, P. Wellens

{"title":"An experimental study on added resistance focused on the effects of bow wave breaking and relative wave measurements","authors":"Vera Hengelmolen, P. Wellens","doi":"10.3233/isp-210018","DOIUrl":"https://doi.org/10.3233/isp-210018","url":null,"abstract":"The added resistance is a resistance component that is not yet satisfactorily predicted, although its accurate estimation is crucial – both from an environmental and economic point of view – from the design stage of a ship until its operation. One of the possible sources of overprediction is the occurrence of bow wave breaking. The first aim of this paper is to study the effect of bow wave breaking on added resistance by combining visual observations with resistance tests. On the other hand, as the bow region of a ship appears to be the most dominant contributor to added resistance, this paper introduces a dynamic waterline detection method involving stereo vision. This experimental method is applied to reach the second aim of this paper, which is to stress the importance of the relative wave elevation in the bow region of the ship. By placing stereo rigs inside the hull of a semi-transparent ship, the waterline at each momnent in time can be tracked using an edge detection algorithm. By performing resistance tests on the Delft Systematic Deadrise Series ship model no. 523, the added resistance is observed to be proportional to the relative wave height squared. The data of the experiment and the information necessary to reproduce the experiment are shared through https://doi.org/10.4121/19525852.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48122510","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

Editorial 社论

IF 0.8

International Shipbuilding Progress Pub Date : 2022-06-14 DOI: 10.3233/isp-229000

Pieter Wellens

引用次数: 0

A modularly tailored commuter ferry platform 模块化定制的通勤渡轮平台

IF 0.8

International Shipbuilding Progress Pub Date : 2022-05-09 DOI: 10.3233/isp-210016

Harsha Cheemakurthy, K. Garme

{"title":"A modularly tailored commuter ferry platform","authors":"Harsha Cheemakurthy, K. Garme","doi":"10.3233/isp-210016","DOIUrl":"https://doi.org/10.3233/isp-210016","url":null,"abstract":"Background: Among the challenges for implementation of Waterborne public transportation (WPT) are the difficulties in procuring efficient ferries tailored towards local requirements. Fundamental questions on the ferry’s environmental impact, speed and procurement costs linger in the public transport (PTP) mind. Objective: In this paper, a methodology for adopting a platform architecture for ferries is illustrated by a modular design approach. Methods: For this, WPT operational profiles are categorized by three route types in a structure for operational requirements including sustainability performance. Generic parameters for size and speed of WPT ferries are defined. Using these parameters as a skeletal structure, a modular commuter ferry concept is proposed as a set of basic modules. As a combination of these functionally independent modules, a ferry can be tailored to fit the operational requirements. Results: The paper proposes standard sizes for waterborne commuter craft and shows that ferries are compatible with land-based public transport in terms of energy efficiency and speed. Suitable speed ranges for mono hulls and catamarans are investigated and the idea of modular design for rational procurement is explored and illustrated for the three type routes. Conclusions: The proposed concepts can make WPT more attractive for PTPs as a sustainable option to complement the existing network.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47797961","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 technique for efficient computation of steady yaw manoeuvres using CFD 一种基于CFD的稳定偏航机动高效计算技术

IF 0.8

International Shipbuilding Progress Pub Date : 2022-05-06 DOI: 10.3233/isp-220001

G. Oud, S. Toxopeus

引用次数: 0

Ship evacuation simulation using a game engine: Modelling, testing and validation 船舶疏散模拟使用游戏引擎:建模，测试和验证

IF 0.8

International Shipbuilding Progress Pub Date : 2022-01-19 DOI: 10.3233/isp-210017

Gabriele Montecchiari, G. Bulian, P. Gallina

{"title":"Ship evacuation simulation using a game engine: Modelling, testing and validation","authors":"Gabriele Montecchiari, G. Bulian, P. Gallina","doi":"10.3233/isp-210017","DOIUrl":"https://doi.org/10.3233/isp-210017","url":null,"abstract":"The topic of evacuation analysis plays an important role in the maritime field, because of its natural link to safety and also because of relevant SOLAS requirements. In this context, this paper focuses on the description, testing and validation of an agent-based mathematical model. As primary goal, the model has been developed targeting a use in evacuation simulations using immersive virtual reality, also with the possibility of real-time human participation. At the same time, the model is suitable also for standard evacuation simulations. The model has been developed starting from existing social force models and introducing a series of improvements, modifications, new modelling, and adaptations. The model is described in detail, providing and discussing all adopted parameters. The choice of a game engine as development environment is also discussed, highlighting benefits and limitations. Results from IMO test cases, validations using experimental data, and comparisons with FDS+Evac are presented. A more realistic test case, relevant to the maritime field, with a two-cabin-deck geometry is also presented, together with corresponding simulation results. Particular attention is paid to the post-processing and reporting of the results from Monte Carlo simulations, in order to properly reflect, quantify and emphasize the underlying aleatory uncertainty.","PeriodicalId":45800,"journal":{"name":"International Shipbuilding Progress","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44781952","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

Editorial 社论

IF 0.8

International Shipbuilding Progress Pub Date : 2022-01-12 DOI: 10.3233/isp-220107

Pieter Wellens

引用次数: 0

Typhoon: A vortex-lattice code for assessing dynamic stability characteristics of hydrofoil crafts 台风:用于评估水翼艇动态稳定性特性的涡格代码

IF 0.8

International Shipbuilding Progress Pub Date : 2021-10-18 DOI: 10.3233/isp-210006

Alec Bagué, J. Degroote, Toon Demeester, E. Lataire

引用次数: 0