Design 2
Wednesday 10th November 2010, 1400hrs–1530hrs
Chaired by Francesco Noschese Application of Ballast Waters and Sediments Management Convention to In-Service Military Vessels Commander Giuseppe Aceto, Italian Navy, Italy The application of the Ballast Waters and Sediments Management Convention (BWSMC) to existing naval units is a topic of current interest. The regulatory and operational constraints which is to measure with, makes demanding the challenge. In fact, it ought to adapt a military Unit to the dictates of the Convention without her operational capabilities are reduced, providing her with a ballast water treatment system approved by the IMO, of adequate size, compatible with the onboard layout, which, possibly, does not use active substances, results simple, reliable and economically sustainable. Therefore, the choosing of the correct size of the system to install is not easy and, if resolved simplistically, leads to a great overestimation of the systems, require more public money and a significant impact for the layout of the ship, due to the greater volumes to allocate. Procedures for management of ballast water stated in the proposed study, in contrast, allow to operate properly this choice tuning it to the real needs of the Unit during her normal exertion, while remaining available and unchanged her extreme operational capabilities. Therefore, in this paper – presenting the new design philosophy, with case studies illustration of – will present technical and economical feasibility analysis for the alignment of some existing Italian Navy Units as case studies, aspiring to point out a realistic and effective approach to proportioning of the ballast water flow rate which those Unit really needs in order to perform their missions. Exploration Tool for Concept Design: Seakeeping Performance Evaluation of Patrol and Frigate Ships Mrs Paola Gualeni, University of Genoa, Italy M. Domenicucci, University of Genoa, Italy At a very early phase of the naval ship acquisition and design process, it is necessary to perform, in a reasonable time, trade-off studies assessing different ship solutions, often defined only by very few parameters. A significant topic during this analysis is the dynamic behaviour in waves, dependant on both ship features and sea state. Unfortunately evaluation tools, able to tackle with the typical concept phase lack of ship details and to consider the influence of sea conditions, are not so common. In this paper an investigation tool, based on a semi-analytical approach, has been developed for the vertical motion evaluation of a mono-hull ship. For the necessary tuning activity, performed with both analytical and numerical procedures, available experimental data have been exploited. The tool, based on a modular approach and built with a very user-friendly graphic interface, assures an easy exchange of input data and results with other tools and is assumed to be suitable for frigate and offshore patrol vessel typology. Besides the vertical motions, the code is able to predict other basic seakeeping properties i.e. slamming, green water, propeller emergence, accelerations and comfort. An operability index is defined combining the above mentioned factors, in order to allow a comprehensive fast evaluation of ship behaviour, through a single parameter. With reference to this index, the influence of main ship dimensions on the global seakeeping performance is analysed. Calculations are then compared with other experimental data and are finally used to evaluate the influence of some operational parameters (e.g. speed or encounter angle) on vessel’s seakeeping properties. Design Structure Matrix Evaluation and Synthesis of System Design Processes Mr. Sean Gallagher, Naval Sea Systems Command (Philadelphia), United States Over the last two and a half years the Naval Sea Systems Command (NAVSEA) has been working to develop a Ship Level Design Process Reference Model (DPRM) for use by the practicing ship design community. As members of this community, various Machinery Systems Design groups have initiated several parallel efforts over this time to support the goal of design process improvement. A key component of these efforts has been the exploration of Dependency and Structure Modeling techniques such as Design Structure Matrix (DSM) and Complexity Management methods as a way to support the analysis, integration, and optimization of disparate machinery systems design processes. This paper will explore the lessons learned by the Naval Surface Warfare Center Philadelphia in the evaluation of DSM processes, tools and techniques as applicable to the design of complex machinery and ship systems. Discussion topics include data collection, formatting, and processing, design process representation and visualization, and utilization of various commercial Design Structure Matrix software tools.
MAST timetable
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Diamond Industry Patron
…great networking and enabled meetings with several prospects.
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Coen Ort
Account Manager, TNO, The Netherlands
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