In late years, the size of RoRo cargo ships has continuously increased, leading to the so-called Large Car Truck Carriers (LCTC). The design of these vessels introduced new challenges that shall be considered during the ship design since the conceptual stage, which has a very strong impact on the technical and economic performances of the vessel during all its life-cycle. In this work, the concept design of an LCTC is presented based on Multi-Attribute Decision Making (MADM). A large set of design alternatives have been generated and compared in order to find out the most promising feasible designs. The proposed approach is based on a Mathematical Design Model (MDM) capable to assess all the main technical and economic characteristics for each design. Among the others, here focus has been done on the ship stability to assure the compliance with statutory rules within the MDM. A new stability metamodel has been developed capable to define the cross curves of stability at the concept design stage. The proposed MADM methodology has been applied to North Europe-Mediterranean transport scenario highlighting the impact of main particulars describing hull geometry on the technical and economic performances of an LCTC ship.
The sustainable growth is becoming every day more present and even mandatory in the framework of global decarbonization and Green House Gases (GHG) reduction. In such a context, electric powering offers important advantages while offering reliable and greener solutions for private-public urban transport. By considering this scenario, in this paper, an electric catamaran equipped with a DC hybrid module is proposed as effective in passenger transport along the Po river, in the Turin urban environment. The study encompasses many challenging aspects, which, in the end, improve the overall ship performance. For instance, the vessel shall be suitable for a quick hauling to the land in case of emergency with a crane truck. Secondly, the DC voltage distribution must provide safe power delivery by maintaining low weights. In this paper, the design is presented, along with the scenario constraints that have defined the peculiarities and addressed the technical choices.
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