One of the 9 application casesApplication Case (AC)of HOLISHIPHOLIstic optimisation of SHIP design and operation for lifecycle (EU H2020 project) (HOLISHIP) is the design of a double-ended ferryDouble-Ended Ferry (DE-ferry). The double-ended ferryDouble-Ended Ferry (DE-ferry) was seen ideal for the case studyCase study because it has clearly defined constrains and objectives, while it attracts the significant interest by customers of the designer, ELOMATIC Ltd. The General ArrangementGeneral Arrangement (GA) (GA) of a double-ended ferryDouble-Ended Ferry (DE-ferry) is mainly built around the need to carry a certain number of cars. Double-ended ferries have strict schedules which can only be achieved by hydrodynamically optimized hull design, trim, efficient propulsion system and low lightweight. The present chapter “Double-Ended FerryDouble-Ended Ferry (DE-ferry)” focuses on the synthesis of software tools forming the Intelligent GA s/w platformPlatform(IGAIntelligent General Arrangement (IGA)) that is used in the double-ended ferryDouble-Ended Ferry (DE-ferry)case studyCase study. Software tools forming the Intelligent GA are CAESESComputer Aided Engineering System Empowering Simulation by FRIENDSHIP SYSTEMS, Germany (CAESES) (hull design), Cadmatic (structure and outfittingOutfitting), NAPANaval Architecture Package for ship design by NAPA Oy, Finland (NAPA)(stability), HSVA’s Fresco+RANSE solver by HSVA and Technical University Hamburg (FreSCo)(resistance and propulsion), HSVA’s ν-shalloNon-linear potential flow code for wave resistance analysis of ships in calm water by HSVA (ν-Shallo)(wave resistance), BV’sBureau Veritas, France (BV)Mars2000 (midship analysis) and BV’s SEECATShip Energy Efficiency Calculation and Analysis Tool (SEECAT®) (energy simulations). The Intelligent GA utilizes parallel multi-disciplinary design and analysis, which is made possible by use of surrogate modelsSurrogate models, as they have been introduced in the HOLISHIPHOLIstic optimisation of SHIP design and operation for lifecycle (EU H2020 project) (HOLISHIP)project. The chapter elaborates on the links between CAESESComputer Aided Engineering System Empowering Simulation by FRIENDSHIP SYSTEMS, Germany (CAESES), Cadmatic and other tools, namely how the general arrangementGeneral Arrangement (GA)data are transferred between CAESESComputer Aided Engineering System Empowering Simulation by FRIENDSHIP SYSTEMS, Germany (CAESES) and Cadmatic during the design process. It explains what parameters were optimised, and what were the constraints in the optimisationOptimisation process. It also describes the link between Cadmatic and BV’sBureau Veritas, France (BV)structural designStructural design tool Mars 2000. Resistance and propulsion optimisationOptimisationis also elaborated. The stability section explains the link to NAPANaval Architecture Package for ship design by NAPA Oy, Finland (NAPA) ad what intact and damage stability rules are applied for the double-ended ferryDouble-Ended Ferry (DE-ferry), which is classified as “D” class according to NON-SOLASSafety of Life at Sea (SOLAS) rules. Of key interest for a zero or reduced emissions double-ended ferryDouble-Ended Ferry (DE-ferry) is the optimal dimensioning of the batteries’ capacity. The chapter explains how the batteries were dimensioned and compares the fully electric vessel against a hybrid version where the batteries are the main source for propulsion and diesel engines/generators are the auxiliary source of energy. The final general arrangementGeneral Arrangement (GA)/design of the double-ended ferryDouble-Ended Ferry (DE-ferry) is the synthesis of all naval architectural disciplines and is presented at the end of the chapter. Constraints, rules, the functionality of the general arrangement, and the optimal solutions proposed by the Intelligent GA platformPlatform decide on the final form of the general arrangementGeneral Arrangement (GA). The exploration of design alternatives, both mathematically and by visual testing/verification, is the basic idea behind the Intelligent GA concept that is fully complying with the basic concept of HOLISHIPHOLIstic optimisation of SHIP design and operation for lifecycle (EU H2020 project) (HOLISHIP). It was concluded that Intelligent GA can be used as an efficient decision-making tool and a tool for the rapid design space exploration. Intelligent GA is not meant to replace designers, as the final verification of the GA quality stays for the naval architects.


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