Parametric Design and Multiobjective Optimization of Containerships

Abstract

The introduction of the energy efficiency design index (EEDI) and ballast water treatment regulations by the International Maritime Organization, the fluctuation of fuel price levels, along with the continuous endeavor of the shipping industry for economic growth and profits has led the shipbuilding industry to explore new and cost-efficient designs for various types of merchant ships. In this respect, proper use of modern computer-aided design/computer-aided engineering systems (CAD/CAE) extends the design space, while generating competitive designs with innovative features in short lead time. The present article deals with the parametric design and optimization of containerships. The developed methodology, which is based on the CAESES/Friendship-Framework software system, is demonstrated by the conceptual design and multiobjective optimization of a midsized, 6500-TEU containership. The methodology includes a complete parametric model of ship's external and internal geometry and the development and coding of all models necessary for the determination of the design constraints and the design efficiency indicators, which are used for the evaluation of parametrically generated designs. Such indicators defining the objective functions of a multi-objective optimization problem are herein the EEDI, the required freight rate, ship's zero ballast container box capacity, and the ratio of the above to below deck number of containers. The set-up multiobjective optimization problem is solved by use of genetic algorithms and clear Pareto fronts are generated. Identified optimal design proves very competitive compared to standard container ship designs of the market.

Optimization of a load control system algorithm for electrically propelled ships using data mining

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Analisis dan Model Standard Angkutan Laut: Studi Kasus Muatan Petikemas

“…Analisis biaya variabel dihasilkan dari berlalunya sistem pengiriman dalam jumlah yang tidak tetap karena biaya bahan bakar dihitung berdasarkan jumlah trip kapal, kebutuhan air bersih, dan makanan (Ting, S.-C., & Tzeng, 2015). Selain itu biaya variabel yang dihitung adalah biaya operasional pelabuhan yang hanya keluar pada saat melayani proses bongkar muat (Tolofari et.al., 2011 Pembuatan model optimasi dilakukan perencanaan ukuran kapal dan biaya total untuk mendapatkan biaya pengiriman petikemas per unit termurah dan efisien (Priftis et al, 2017).…”

Parametric design and multi-objective optimisation of containerships

“…On the other hand, the present study deals with a fast, holistic optimisation of a 6,500 TEU containership, focusing on optimisation of the ship's arrangements, while considering all side effects on ship design, operation and economy ( Fig. 1) (Priftis et al, 2016). Holism is interpreted as a multiobjective optimisation of ship design and is based on the main idea that a system, along with its properties, should be viewed and optimised as a whole and not as a collection of parts (Papanikolaou, 2010).…”