References of "Pircalabu, Eugen"
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See detailTools for early design stage: presentation of LBR-5 Software
Rigo, Philippe ULg; Bair, Frédéric ULg; Caprace, Jean-David ULg et al

in Zanic, Vedran; Andric, Jerolim (Eds.) Proceedings of IMPROVE Final Workshop (2009, September)

LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints – structural, geometrical, etc. – an optimum scantling can quickly been found. In the framework of IMPROVE ... [more ▼]

LBR-5 is a tool for early design stage. Taking into account numerous kinds of constraints – structural, geometrical, etc. – an optimum scantling can quickly been found. In the framework of IMPROVE European project many new modules have been implemented to increase the quality of the optimised scantling. Mainly 6 major changes have been brought: implementation of a sloshing module, a fatigue module, a multi-structure module, a multi-materials module, a life cycle cost module and finally a vibration module. Tests to validate these modules have been carried out on the three ships studied in the IMPROVE project: a LNG, a Chemical Tanker and a ROPAX. [less ▲]

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See detailOptimization or Rolling and Floating Lock Gates
Rigo, Philippe ULg; Pircalabu, Eugen ULg; Amrane, Amirouche ULg et al

in PIANC'08 (2008, June)

This paper presents a methodology to minimize the weight of the gate by optimizing simultaneously the height of the floating tanks, the number of their watertight partitions and the gate scantling while ... [more ▼]

This paper presents a methodology to minimize the weight of the gate by optimizing simultaneously the height of the floating tanks, the number of their watertight partitions and the gate scantling while considering the floating stability (Richir et al. 2006) The rolling gate, considered for this lock, has to float to be led into the port for maintenance or repairing operations. Two partitioned floating tanks are used inside the gate. Water ballast can be pumped from the floating tanks to float the structure or to restore the mass equilibrium in case of damage due to boat impact. [less ▲]

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See detailStructural Optimization of a 220 000 m³ LNG Carrier
Toderan, Catalin; Guillaume Combecave, Jean-Louis; Boukaert, Michel et al

in Conference on Computer Applications and Information Technology in the Maritime Industries (COMPIT) (2008, April)

This paper relates to the development of a new concept of 220.000 m³ LNG designed by AKERYARDS France. This work is performed in the framework of FP6 IMPROVE project. The first phase of the activity ... [more ▼]

This paper relates to the development of a new concept of 220.000 m³ LNG designed by AKERYARDS France. This work is performed in the framework of FP6 IMPROVE project. The first phase of the activity related to the identification of stakeholder’s requirements and the definition of key performance indicators. In parallel, several calculations have been performed to test the existing tools and to evaluate the potential gain at the concept design. These activities, associated with the definition of a 220000 m³ QuatarFlex prototype, including the aspects related to the naval architecture and general arrangement, have been re-grouped in the so-called “first design loop”. The second phase concerns the development of new modules to be integrated in the optimization tools in order to satisfy the requirements defined in the first phase. The final phase will be the application of the new (improved) optimization tools for the final LNG product. We highlight that the main target will be the multi-objective structural optimization of the prototype defined by “the first design loop”. However, some feed-back concerning the naval architecture point of view could be expected in this phase. The aim of the paper is to present the results of the first phase, as well as an overview of the analyses carried out during the “first design loop”. Details about the different methodologies proposed for the second phase of the development are given. [less ▲]

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See detailIntegration of a Bottom-Up Production Cost Model in LBR-5 Optimization Tool
Toderan, Catalin; Pircalabu, Eugen ULg; Caprace, Jean-David ULg et al

in Conference on Computer Applications and Information Technology in the Maritime Industries (COMPIT) (2007, April)

The LBR-5 software allows the optimization of ship structures following different objectives as the highest inertia, least weight and/or least cost. The interest of European shipyards to optimize the ship ... [more ▼]

The LBR-5 software allows the optimization of ship structures following different objectives as the highest inertia, least weight and/or least cost. The interest of European shipyards to optimize the ship structure is basically related to the production cost and mainly to the labor cost. In order to increase the quality of cost estimation, a bottom-up module has been developed by University of Liege in partnership with AKERYARDS France. This module has been validated on different types of ships (LNG, Cruise Vessels, Fast Ferry) and integrated in the LBR-5 optimization process. The bottom-up cost module has two important goals. The first one is to estimate accurately the labor cost of a given ship structure taking into account the production breakdown, the block splitting sequence and all the individual operations required by the fabrication process. The second one is to compute properly the sensitivities of the design objective (construction cost) related to the design variables (scantlings). The paper also presents the results of a validation test on a large passenger vessel. The effect of the bottom-up cost module on the optimal scantling and on the cost gain is highlighted through a comparison with the results obtained using a basic cost module. [less ▲]

Detailed reference viewed: 91 (15 ULg)