Tools for early design stage: presentation of LBR-5 Software

peer reviewedLBR-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

An Analytical Cost Assessment Module for the Detailed Design Stage

peer reviewedThe main goal of the project is to implement a “real time” and automatic cost assessment model of the ship hull construction, which integrates the design criteria and production parameters. The presented method for short-term cost assessment promises to increase the productivity. Nowadays, cost assessment is a key task of an integrated ship design. The various methods to estimate the production cost differs with the required information (input data). The less information is needed, the earlier this method can be used in the design process. The more information is used, the better we can assess the differences between design alternatives. This means: − At the basic design stage: validate the budget and give a reliable bidding price, − At the detailed design stage:, plan the deadlines and establish the production schedule, − At the scheduling production stage: distribute the workload between the various production workshops and assess the productivity. A first prototype of cost assessment module reaches the validation stage at the Alstom Marine St Nazaire shipyard (Chantiers de l’Atlantique) within the framework of the European project InterSHIP which has partly financed the study. In the future, cost assessment will become increasing important. It is proposed to assist/help the designers by a “real time” follow-up of the cost, starting at the earliest conceptual design stage up to the latest detailed design stage. The development such a cost assessment tool requires considering simultaneously the design criteria and the production parameters. Designers will consequently be able to choose the least expensive options at each step of the design procedure (earlier is of course better)

Automated scantling optimization of ships’ midship transverse frame in concept design phase

This paper concerns the scantling optimization of a vessel’s midship transverse frame during the conceptual design phase. The main focus of the present research is to demonstrate an automated optimization process for a typical midship transverse frame of RoPax vessel which has been developed within the framework of EU HOLISHIP project (2016-2020). To this end, a number of existing tools along with their new script/batch-mode developments (namely STEEL®, a tool from Bureau Veritas for the structural strength assessment of primary transverse frames, and modeFRONTIER® as the optimization tool) as well as some new in-house tools/modules (e.g. Rule Infringement Indicator, Weight/CG Calculator) have been integrated under an automated iterative routine

OptiView − A Powerful and Flexible Decision Tool Optimising Space Allocation in Shipyard Workshops

peer reviewedThis paper presents new developments to maximize the number of ship blocks and ship sections produced in various workshops of shipyards during a certain time window. The visualization tool OptiView® was developed to support users to improve the space utilization and workshop productivity. The software is coupled with a heuristic optimisation solver. The paper describes the approach to the space allocation problem and gives three application examples

AN INTEGRATED FRAMEWORK FOR SHIP STRUCTURAL OPTIMISATION IN CONTRACT DESIGN PHASE

This paper demonstrates the implementation of an integrated workflow for the finite element based structural assessment/optimization of a 3D midship segment of RoPax vessel within contract design phase. Commercial software such as AVEVA Marine®, ANSYS® and modeFRONTIER® and newly developed in-house tools/modules have been integrated under an automated iterative routine. The structural optimisation carried out with an aim to reduce the structural weight of the ship with least value for vertical centre of gravity. Constraints implemented in the optimization include relevant BV rules and shipyard re- quirements.The work is performed within the framework of European Union’ s HOLISHIP (2016-2020) project

Développement des Super-Eléments -ULIEGE

Ce document est un récapitulatif des travaux effectués dans le cadre du WP3 du projet COLL FOWT durant les 3 années du Projet