Ciencia y tecnología de buques <div class="container"> <div class="wt-rotator"> <div class="screen"><noscript>&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;!-- placeholder 1st image when javascript is off --&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;img src="images/madness_arch2.jpg"/&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;</noscript></div> <div class="c-panel"> <div class="thumbnails"> <ul> <li class="show"><a title="cotecmar" href="/public/site/images/biteca/1_657.jpg"> <img src="/public/site/images/biteca/1_657.jpg" alt=""> </a> <div style="top: 5px; left: 10px; width: 390px; height: 0; color: #fff; background-color: #000;"> <h1>Componente fluvial</h1> PAF-P</div> </li> <li class="show"><a title="cotecmar" href="/public/site/images/biteca/2_658.jpg"><img src="/public/site/images/biteca/2_658.jpg" alt=""></a> <div style="top: 5px; left: 10px; width: 390px; height: 0; color: #fff; background-color: #000;"> <h1>Componente marítimo</h1> OPV</div> </li> <li class="show"><a title="cotecmar" href="/public/site/images/biteca/3_658.jpg"><img src="/public/site/images/biteca/3_658.jpg" alt=""></a> <div style="top: 5px; left: 10px; width: 390px; height: 0; color: #fff; background-color: #000;"> <h1>Componente fluvial</h1> Lancha patrullera de río LPR</div> </li> <li class="show"><a title="cotecmar" href="/public/site/images/biteca/4_658.jpg"><img src="/public/site/images/biteca/4_658.jpg" alt=""></a> <div style="top: 5px; left: 10px; width: 390px; height: 0; color: #fff; background-color: #000;"> <h1>Oficinas de diseño</h1> Cotecmar</div> </li> <li class="show"><a title="cotecmar" href="/public/site/images/biteca/5_658.jpg"><img src="/public/site/images/biteca/5_658.jpg" alt=""></a> <div style="top: 5px; left: 10px; width: 390px; height: 0; color: #fff; background-color: #000;"> <h1>Ingeniería concurrente</h1> </div> </li> </ul> </div> <div class="buttons"> <div class="prev-btn">.</div> <div class="play-btn">.</div> <div class="next-btn">.</div> </div> </div> </div> </div> en-US <p>The authors who publish in this Journal certify that:</p><ul><li>The work submitted for publication in The Ship Science and Technology journal, was written by the author, given that its content is the product of his/her direct intellectual contribution.</li><li>All data and references to material already published are duly identified with their respective credits and are included in the bibliographic notes and quotations highlighted as such.</li><li>All materials submitted for publication are completely free of copyrights; consequently, the author accepts responsibility for any lawsuit or claim related with Intellectual Property Rights thereof, Exonerating of responsibility to The Science and Technology for the Development of Naval, Maritime, and Riverine Industry Corporation, COTECMAR.</li><li>In the event that the article is chosen for publication by The Ship Science and Technology journal, the author state that he/she totally transfers reproduction rights of such to The Science and Technology for the Development of Naval, Maritime, and Riverine Industry Corporation, COTECMAR.</li><li>The authors retain the copyright and transfer to COTECMAR the right of publication and reproduction of the work which will be simultaneously subject to the <strong><a href="" target="_blank">Creative Commons Attribution License (CC -BY)</a> </strong>, which allows the license to copy, distribute, display and represent the work and to make derivative works as long as it recognizes and cites the work in the manner specified by the author or licensor.</li><li>For more information about the <strong>Creative Commons Attribution License (CC -BY)</strong> and his use and scope, please visit the following web page <a href="" target="_blank"></a></li></ul> (Carlos Eduardo Gil De los Rios) (Adriana Lucía Salgado Martinez) Sun, 31 Jan 2021 00:00:00 -0500 OJS 60 Editorial Note Carlos Eduardo Gil de los Ríos Copyright (c) 2021 Cotecmar Sun, 31 Jan 2021 00:00:00 -0500 Analysis of integrated logistics support (ILS) in the shipbuilding industry. Advantages and improvement opportunities for the naval industry. COTECMAR case study <p>Integrated Logistics Support (ILS) applied in the world-class shipbuilding industry has set significant trends in the processes and life cycles of the products and/or systems developed. COTECMAR as a Countrywide pioneer company in this sector, with specific strengths in naval prototypes, has been developing actions together with the National Navy to integrate concepts related to ILS, in its processes. Therefore, a detailed analysis of how these processes are facing the requirements of such support, has become necessary, starting from the initial basis of the possible advantages and opportunities for improvement that this could bring to the corporation and the sector. This is based on the theoretical and conceptual foundations in the ILS framework and how these are developed in the company under analysis.</p> Lissette P Casadiego Miranda, Edinson A Bastos Blandos, Edwin Paipa Sanabria, Mónica Ruiz Pianeta, Javier S Pinzón Ramírez, Nelson F Zuñiga Portillo Copyright (c) 2021 Cotecmar Sun, 31 Jan 2021 00:00:00 -0500 Analysis for use coastguard Offshore Platforms or SWATH Patrol Vessels in the Colombian Pacific Ocean <p>The average cocaine seizure rate of coast guard operations in the Colombian Pacific can be improved. To enhance this indicator, detection and interdiction must be improved. Therefore, the option of using an offshore platform with better detection means, and several Rapid Reasponse Units (RRUs) stationed offshore, is being analyzed. As a result, offshore platforms are neither feasible nor viable due to the depth of the sea floor (&gt; 2 km), but SWATH platforms can be used. The parametric design of two SWATHs is performed and an operational evaluation is made of the different current units and SWATHs. The operational evaluation of the different current units and the proposed SWATHs is carried out and contrasted with their acquisition and life cycle cost, showing that the SWATHs have a better efficiency/cost ratio. Therefore, they can be considered as an alternative to improve the efficiency of cocaine seizures and other coast guard operations.</p> Miguel Calvache Ramírez, Oscar Raúl García Baquero Copyright (c) 2021 Cotecmar Sun, 31 Jan 2021 00:00:00 -0500 Design of a marine propeller for scale racing boats in a speed and energy efficiency contest <p>The process of optimized design, evaluation and manufacturing of high energy efficiency propellers for competition boats at scale is addressed in this research. This project uses the stages of hydrodynamic design, numerical testing and manufacturing of four prototypes as example. During the hydrodynamic design, three design methodologies were compared, namely: Blade Element Theory, lifting line theory and design based on DTMB propeller series. The objective function of the optimized design is based on obtaining the chord and pitch distribution that generates the greatest thrust, speed and efficiency. Similarly, the performance of each prototype was evaluated by CFD in a virtual channel registering thrust, torque and speed. Finally, the additive manufacturing process applied is presented. Prototyped propellers present efficiencies and maximum speeds approximately 15% higher than recommended commercial propellers for this type of boats. This study was developed by the Hydrometra group in the framework of the international competition Hydrocontest 2017.</p> Daniel E. Riveros Nieto Copyright (c) 2021 Cotecmar Sun, 31 Jan 2021 00:00:00 -0500 Conceptual design of coastal patrol vessel (CPV) with flight deck for the reception and deployment of helicopter <p>This paper presents the development of the conceptual design of a coastal Patrol vessel with the capacity to receive and deploy a helicopter, in order to increase the efficiency of coastguard operations developed by the Colombian National Navy. As a starting point, the design of the coastal patrol vessel built by Cotecmar and named CPV46 was taken, on which modifications were implemented in its main dimensions and distribution of spaces, which allowed to include a flight deck to receive a BELL 412 EP helicopter, complying with the regulations for this type of operations.<br>This design was developed based on the design spiral method, where each turn of the spiral includes estimates and performance calculations influenced by each other and corresponding to the different stages of the design. For this work, the conceptual design was divided into eight booklets containing the state of the art, mission profile, capacity sizing, naval architecture, propeller selection, generator selection, stability study and cost estimation, concluding in the feasibility of the design based on its cost at a conceptual level.</p> Miguel Ángel Guerrero Sanchez, Edgar Marcelo Cali Yambay Copyright (c) 2021 Cotecmar Sun, 31 Jan 2021 00:00:00 -0500 Application of Cubic B-Spline Curves for Hull Meshing <p>This paper describes the development of a regular hull meshing code using cubic B-Spline curves. The discretization procedure begins by the definition of B-Spline curves over stations, bow and stern contours of the hull plan lines. Thus, new knots are created applying an equal spaced subdivision procedure on defined B-spline curves. Then, over these equal transversal space knots, longitudinal B-spline curves are defined and subdivided into equally spaced knots, too. Subsequently, new transversal knots are created using the longitudinal equally spaced knots. Finally, the hull mesh is composed by quadrilateral panels formed by these new transversal and longitudinal knots. This procedure is applied in the submerged Wigley hulls Series 60 Cb=0.60. Their mesh volumes are calculated using the divergence theorem, for mesh quality evaluation.</p> César Augusto Salhua Moreno Copyright (c) 2021 Cotecmar Sun, 31 Jan 2021 00:00:00 -0500