Trans RINA, Vol 154, Part C1, Intl J Marine Design, Jan - Jun 2012


 development of a parametric design model that describes the principal characteristics of the design brief;


 selection of numerical simulation tools that can predict the performance measures using designs generated from the parametric model; and finally


 automated generation and analysis of design variants from the parametric model using an algorithm which efficiently covers the multi- dimensional design-space over the full range of values identified for each design parameter.


5.2 DESIGN-SPACE UTILISATION


The resulting data is collected and post-processed to develop response surface models which can be used to interpolate the performance measures for any instance of the design parameters. These RSM can then be used by the design team to develop an understanding of the design-space and also for the basis of developing and refining


design solutions techniques.


 fit multi-dimensional RSM to the performance measures calculated across the design-space;


 extract data from the RSM in a form that can be more easily visualised and exploited to facilitate and expedite the design process.


2. 3. using formal optimisation


The key thing to take from this paper is the methodology. The details of the specific parametric model and analysis tools used are of less importance because they can (and should) be adapted and tailored to the specific needs of the individual project. However, what this paper aims to show is how an in-depth knowledge of the design-space in which one finds oneself can be gained by more formal and extended use of numerical simulation. Of course, as computational power continues to increase and the accuracy of numerical simulation techniques continues to improve, it will be appropriate to change the hardware and


software exploration. It


used to is


perform believed by the the authors


design-space that


the


approach described in this paper will aid naval architects during their design tasks by providing familiarity with novel design ideas more quickly and allowing them to make appropriate design modifications to match evolving client requirements more easily.


6. 1.


REFERENCES


FRIENDSHIP SYSTEMS, User Guide FRIENDSHIP-Framework, Potsdam, Germany, 2009. http://www.friendship-systems.com/


FLOWTECH International AB, SHIPFLOW 4.3


Users Manual, Gothenburg, Sweden, 2009. http://www.flowtech.se/


FORMATION DESIGN SYSTEMS Pty Ltd, Seakeeper User Manual, Hydromax User


Manual, Fremantle, Western Australia, 2011. http://www.formsys.com


4.


HARRIES, S., ‘Investigating Multi- Dimensional Design Spaces Using First Principle Methods’, Seventh International Conference on High-Performance Marine Vehicles (HIPER), Melbourne, Florida, USA. 2010.


5.


BRENNER, M., ‘Integration of CAD and CFD for the Hydrodynamic Design of Appendages in Viscous Flow’, Diploma thesis, Technical University Berlin, Germany, 2008.


6.


Figure 11: Methodology to set up and utilise the design- space.


Several design scenarios have been described to highlight where use of the methodology can assist the design team. One of the key benefits is the speed with which the design-space


7. exploration can be implemented. This


allows the design team to gain knowledge of the design- space very early in the project, or even before the project commences (when delivering tender proposals, for example).


©2012: The Royal Institution of Naval Architects SALVESEN, N., TUCK, O.E. and


FALTINSEN, O., ‘Ship motions and sea loads’, Transactions, Society of Naval Architects and Marine Engineers, No. 78:250-287, 1970.


McCAULEY, M.E., ROYAL, J.W., WYLIE, C.D., O‘HANLON, J.F., and MACKIE, R.R., ‘Motion sickness incidence: Exploratory studies of habituation, pitch and roll and the refinement of a mathematical model’, Human Factors Reseach Inc., Technical Report 1733-2 (USN ONR contract N00014-73-C-0040), 1976.


C-25


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64