Metamodels for seakeeping assessment of fishing vessels

Year 2021, Volume: 1 Issue: 1, 37 - 50, 30.12.2021

Giorgio Trincas , Roberto Rocchi

https://doi.org/10.14744/seatific.2021.0005

Abstract

The most significant goals of this paper are: (i) to provide additional insight on the influence of hull form parameters on seakeeping performance of typical Mediterranean fishing vessels; (ii) to develop efficient and reliable metamodels for fast and reliable evaluation of seakeeping performance in am multiattribute decision-making environment; (iii) to facilitate and speed up the selection of the design with the best possible seakeeping performance at conceptual design stage. To enhance the accuracy and applicability of predictions of seakeeping characteristics and to find out guidelines for design scope, new metamodels have been developed from an extended database of 57 cases, which comprehends the hull form geometrical data, heave (h), pitch (p) and vertical acceleration (av) rms value of both old 39 cases studied previously as well as new 18 cases of Mediterranean coastal fishing vessels previously analysed for resistance assessment. Main statistical parameters of the derived regression equations show a substantial improvement of statistical accuracy in h, p and av estimates,particularly when geometrical descriptors of forebody and afterbody hull form are included as independent variables. Statistical homogeneity of the N57 extended database was verified by cluster analysis of selected responses with classical hull form coefficients/parameters, and new descriptors data altogether taken as discriminant variables in two nucleus clustering analysis. Values of heave, pitch and vertical acceleration yielded by the metamodels have been compared to the ones determined by means of direct computations. Low residuals have confirmed reliability of the proposed prediction metamodels to determine since conceptual design stage seakeeping performance of fishing vessels with hull forms and main dimensions which could be included in the design space defined by the population forming the extended database.

Keywords

Metamodels, seakeeping, fishing vessels

References

• Alkan, A.D., Ozmen, G. & Gammon, M.A. (2003). Parametric Relation of Seakeeping, Proceedings 9th Symposium on Technics and Technology of Fishing Vessels, Ancona, Italy.
• Bales, N.K. (1980). Optimizing the Seakeeping Performance of a Destroyer-Type Hull. Proceedings 13th ONR Symposium on Naval Hydrodynamics, Tokyo.
• Bales, N.K. & Cummins, W.E. (1970). The influence of hull forms on seakeeping. Transactions SNAME, 78.
• Cakici, F. & Aydin, M. (2014). Effects of Hull Form Parameters on Seakeeping for YTU Gulet Series with Cruiser Stern. International Journal of Naval Architecture and Ocean Engineering, 6, 700−714.
• Fang, K.-T., Li, R & Sudijanto, A. (2006). Design and Modelling for Computer Experiments. Chapman & Hall/ CRC.
• Fox, J. (2011). A Capability-Based, Metamodel Approach to Combatant Ship Design. MSc Thesis in Systems Engineering, Naval Postgraduate School, Monterey, CA.
• Hearn, G.E., Hills, W. & Sarioz, K. (1991). A Hydrodynamic Design Methodology for Conceptual Ship Design, Proceedings ICCAS 91, Brazil.
• Kishev, R. (1992). General Considerations on Ship Seakeeping Optimization in Design, Proceedings Osaka Meeting on Seakeeping Performance, 20th ITTC Seakeeping Committee, Osaka.
• Kleijnen. J.P.C. & Sargent, R.G. (2000). A methodology for fitting and validating metamodels in simulation. European Journal of Operational Research, no. 120, pp. 14–29.
• Korvin-Kroukovsky, B.V. (1955). Investigations of ship motions in regular waves, Transactions SNAME, 63.
• Lewis, F.M. (1929). The inertia of the water surrounding a vibrating ship. Transactions SNAME, 37.
• Li, Dong-qin, Wilson, P.A., Jiang Zhi-yong. & Zhao Xin (2016). Establishment of metamodels for ship seakeeping performance using an effective approximation modeling method. Journal of Ship Mechanics, 20(3) 243−257.
• Logan, P. W., Morris, B., Harvey, D. & Gordon, L. (2013). Model-Based Systems Engineering Metamodel: Roadmap for Systems Engineering Process. Proceedings SETE 2013 Conference, Canberra.
• Loukakis, T.A. & Chryssostomidis, C. (1975). Seakeeping Standard Series for Cruiser-Stern Ships, Transactions SNAME, 83.
• McCreight, V. (1983). Estimating the seakeeping qualities of destroyer-type Hulls, DTNSRDC Report SRD-2074-01.
• Moor, D.I. & Murdey, D.C. (1968). Motions and propulsion of single screw models in head sea. Transactions RINA, 110.
• Nabergoj, R., Perniciaro, S. & Trincas, G. (2003). Seakeeping Assessment Modelling for Conceptual Design of Fishing Vessels, Proceedings 9th International Symposium on Technics and Technology in Fishing Vessels, Ancona.
• Rocchi, R. (1988). A Statistical Prediction Method for Ocean-Going Fishing-Vessels, Proceedings 17th Scientific and Methodological Seminar on Ship Hydrodynamics, Varna.
• Rocchi, R. (1992). A Practical Tool for Reliable Prediction of the Speed-Resistance Curve for Fishing Vessels, Proceedings 5th International Symposium on the Practical Design of Ships and Mobile Units, Elsevier Applied Science PRADS’92, Caldwell and Ward Eds., 1.
• Salvesen, N.; Tuck, E.P. & Faltinsen, O. (1970). Ship motions and sea loads. Transactions, SNAME, 78. Şayli, A., Alkan A. D. & Ganiler O. (2010). Nonlinear meta-models for conceptual seakeeping design of fishing vessels. Ocean Engineering, 37(8), 730−741.
• Şayli, A., Alkan A. D. & Aydin, M. (2017). Determination of relational classification among hull form parameters and ship motions performance for a set of small vessels. Brodogradnja, 67(1-4), 1-14
• St. Denis, M. & Pierson, W.J. (1953). On the motions of ships in confused seas. Transactions SNAME, 61.
• Trincas, G., Messina, G. & Nabergoj, R. (2000). Seakeeping Performance for Mediterranean Fishing Vessels, Proceedings IX Congress IMAM 2000, Cassella et al. Eds., Ischia, 2000, Vol. I.
• Trincas, G. & Nabergoj, R. (2000). Multicriterial Selection and Ranking of Fishing Vessels for Efficient Operation, Proceedings Fourth Osaka Colloquium on Seakeeping Performance of Ships; Naito and Ikeda Eds., OC 2000, Osaka.
• Trincas, G., Nabergoj, R. & Messina, G. (2001). Inverse Problem Solution to Identify Optimum Hull Forms of Fishing Vessels for Efficient Operation, Proceedings 8th Symposium on Technics and Technology of Fishing Vessels, Ancona.
• Walden, D.A. & Grundmann, P. (1985). Methods for designing hull forms with reduced motions and dry foredecks. Naval Engineers Journal, 97, 214−223.
• Wijngaarden, van A.M. (1984). The optimum form of a small hull for the North Sea area. International Shipbuilding Progress, 31(359).
• Zborowski, A. & Shiaw-Jyh, L. (1992). Optimization of Hull Form for Seakeeping Performance. Proceedings 5th International on the Practical Design of Ships and Mobile Units, PRADS’92, Applied Science, Caldwell and Ward Eds., 1.