References of "Rigo, Philippe"
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See detailSHIP COLLISION ON LOCK GATES – TECHNICAL SOLUTIONS AND SIMULATION APPROACHES
Ehlers, Sören; Le Sourne, Hervé; Buldgen, Loïc ULg et al

in Proceedings of the ICTWS 2014 7th International Conference on Thin-Walled Structures, Busan 28th September - 02 October 2014 (2014, September)

A ship colliding with a lock gate can result in severe structural damage and disrupt the lock operations. For heavily trafficked waterways containing locks such disruption of the lock operation can result ... [more ▼]

A ship colliding with a lock gate can result in severe structural damage and disrupt the lock operations. For heavily trafficked waterways containing locks such disruption of the lock operation can result in severe economic consequences if the gate has to be repaired, both for the lock operator and for the delayed ships. Consequently, the consequences of a ship colliding with a lock gate must be assessed. Therefore, this paper will present current regulatory requirements and recommendations including gate protection systems. Furthermore, simulation methods will be presented to allow for a direct assessment of the structural consequences. Thus, these methods will potentially lead to new structural design considerations as well as operational limitations in terms of specific ship approach velocities to remain below critical impact energies and thus allow for an undisrupted lock operation. [less ▲]

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See detailA SIMPLIFIED PROCEDURE TO ASSESS THE DYNAMIC PRESSURES ON LOCK GATES
Buldgen, Loïc ULg; Gazerzadeh, Afshin; Bela, Andreea ULg et al

in Proceedings of the ICTWS 2014 7th International Conference on Thin-Walled Structures, Busan 28th September - 02 October 2014 (2014, September)

The paper is concerned with the seismic design of lock gates. During an earthquake, it is evident that the liquid contained in the lock chamber is responsible for an additional hydrodynamic pressure ... [more ▼]

The paper is concerned with the seismic design of lock gates. During an earthquake, it is evident that the liquid contained in the lock chamber is responsible for an additional hydrodynamic pressure acting on the structure. This one is known to have three different contributions, which are respectively called the convective, rigid and flexible impulsive parts. The two first ones have already been extensively studied in the literature and are quite easy to evaluate. Nevertheless, characterizing the flexible contribution is more difficult, as it is largely influenced by the coupling occurring between the fluid and the gate. The only relevant way to overcome this difficulty seems to resort to finite elements software, which is not always convenient. Therefore, some research have been undertaken to provide a rapid meshless method leading to an approximation of the flexible pressure on lock gates. As detailed in the present paper, this is achieved by applying an analytical approach based on the virtual work principle. As a matter of validation, the results obtained analytically are compared to numerical solutions. The agreement between both of them is found to be satisfactory. [less ▲]

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See detailSIMPLIFIED SEISMIC ANALYSIS OF LOCK GATES
Buldgen, Loïc ULg; Degée, Hervé ULg; Lesourne, Hervé et al

in PIANC 2014 Conference (2014, June 02)

The paper deals with the seismic design of lock gates. When such structures are submitted to an earthquake, the water contained in the chamber is responsible for an additional hydrodynamic pressure acting ... [more ▼]

The paper deals with the seismic design of lock gates. When such structures are submitted to an earthquake, the water contained in the chamber is responsible for an additional hydrodynamic pressure acting on the gate. This one is the sum of three different parts, respectively called the convective, rigid and flexible contributions. The two first ones have already been extensively studied in the literature, but the flexible part is more difficult to assess as it is largely influenced by the coupling occurring between the fluid and the gate. To overcome this difficulty, it is of course possible to use finite elements software, but doing so is not always convenient. This is why some research have been undertaken to provide a rapid way for approximating the flexible pressure on lock gates. This is achieved by applying the analytical approach that is shortly presented in this paper. As a matter of validation, the results obtained through this simplified procedure are compared to numerical solutions. The agreement between both of them is found to be satisfactory. [less ▲]

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See detailULTIMATE STRENGTH - Discussion on Committee ISSC2012's report
Rigo, Philippe ULg

in Fricke, Wolfgang; Bronsart, Robert (Eds.) PROCEEDINGS OF THE 18TH INTERNATIONAL SHIP AND OFFSHORE STRUCTURES CONGRESS - VOLUME 3 (2014)

Concern for the ductile behavior of ships and o shore structures and their structural components under ultimate conditions. Attention shall be given to the influence of fabrication imperfections and in ... [more ▼]

Concern for the ductile behavior of ships and o shore structures and their structural components under ultimate conditions. Attention shall be given to the influence of fabrication imperfections and in-service damage and degradation on reserve strength. Uncertainties in strength models for design shall be highlighted. [less ▲]

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See detailResilience to Flooding - Draft Building Code
Clarkson, John; Sullican, David; Braun, Kenton et al

in PIANC Yearbook 2013 (2014)

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See detailA review on simulation-based optimization methods applied to building performance analysis
Nguyen, Anh Tuan ULg; Reiter, Sigrid ULg; Rigo, Philippe ULg

in Applied Energy (2014), 113

Recent progress in computer science and stringent requirements of the design of “greener” buildings put forwards the research and applications of simulation-based optimization methods in the building ... [more ▼]

Recent progress in computer science and stringent requirements of the design of “greener” buildings put forwards the research and applications of simulation-based optimization methods in the building sector. This paper provides an overview on this subject, aiming at clarifying recent advances and outlining potential challenges and obstacles in building design optimization. Key discussions are focused on handling discontinuous multi-modal building optimization problems, the performance and selection of optimization algorithms, multi-objective optimization, the application of surrogate models, optimization under uncertainty and the propagation of optimization techniques into real-world design challenges. This paper also gives bibliographic information on the issues of simulation programs, optimization tools, efficiency of optimization methods, and trends in optimization studies. The review indicates that future researches should be oriented towards improving the efficiency of search techniques and approximation methods (surrogate models) for large-scale building optimization problems; and reducing time and effort for such activities. Further effort is also required to quantify the robustness in optimal solutions so as to improve building performance stability. [less ▲]

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See detailA Simplified procedure to assess the dynamic pressures on large reservoirs
Buldgen, Loïc ULg; Degée, Hervé ULg; Le Sourne, Hervé et al

in Proceedings of the 9th International Conference on Structural Dynamics - EURODYN 2014 (2014)

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See detailPIANC Report n° 137 - 2014 NAVIGATION STRUCTURES: THEIR ROLE WITHIN FLOOD DEFENCE SYSTEMS
Clarkson, John; Braun, Kenton; Forsyth, Graeme et al

Book published by PIANC (2014)

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See detailA bi-objective optimization model for a bimodal network of oil transportation
Belaid, Emna ULg; Saadi, Ismaïl ULg; Rigo, Philippe ULg et al

Conference (2014)

Transportation of oil requires attention for a variety of reasons, the most important being the external costs caused by adverse events. These adverse events affect not only the environment costs but also ... [more ▼]

Transportation of oil requires attention for a variety of reasons, the most important being the external costs caused by adverse events. These adverse events affect not only the environment costs but also the societal costs. In this paper, a bi-objective optimization model for a bimodal network of oil transportation is presented. The paper discusses a mathematical model that takes into account two main decision criteria, namely cost and safety. A linear programming model is presented, in which the focus is laid on the different elements that affect the performance of the bi-modal transportation chain of oil. The disturbing elements that are considered include technical failures, road conditions and vandalism acts. Thus, in this study, it is investigated how the bimodal network must be designed to avoid adverse effects caused by these disturbing elements. The goal of the approach is to maximize safety and minimize costs. Data from a real life example (i.e. the Tunisian national oil company) will be used to calibrate the model. [less ▲]

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See detailSmart Rivers Conference 2013 - Proceedings
Rigo, Philippe ULg; Wolters, Milou

Book published by PIANC - 25th Nov 2013 (2013)

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See detailSmart Rivers Conference 2013 - Abstract Booklet
Rigo, Philippe ULg; Wolters, Milou

Book published by PIANC - Edition 25th Nov 2013 (2013)

SMART RIVERS Booklet, including the abstracts of the various papers

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See detailOptimisation Methodology Applied to Ship Design
Amrane, Amirouche ULg; Bayatfar, Abbas ULg; Rigo, Philippe ULg

in Practical Design of Ships and Other Floating Structures, CECO 20-25 October 2013 (2013, October)

Optimization with mathematical algorithms can be very helpful to find the best solution (minimum weight, minimum cost, maximum inertia, …). Typically, finite element analysis (FEA) tools are used in ship ... [more ▼]

Optimization with mathematical algorithms can be very helpful to find the best solution (minimum weight, minimum cost, maximum inertia, …). Typically, finite element analysis (FEA) tools are used in ship structural assessment. But, to build a FEM model from a CAD one is not easy and needs a big amount of manual work. This paper presents an innovative optimization workflow by which the following steps are automatically carried out, without any manual intervention. First, from the 3D CAD model, an idealized CAD model is created by the idealization module to take into account the FEM needs. Then, the idealized CAD model is transferred to the FEM tool. After that, the FEM model is meshed, loaded and solved. The obtained results (stress, volume etc.) are transferred to the optimizer. The optimizer evaluates the values of the objective function and the constraints previously defined and modify the design variables (plate thickness and the stiffener scantling) to create a new structural model. After several iterations, the optimum solution is evaluated. [less ▲]

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See detailA Rapid Procedure for Estimating the Ability of Lock Gates to Withstand Ship Collisions
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Proceedings of the PIANC Smart Rivers 2013 Conference (2013, October)

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See detailJacks of all trades and masters of some
Rigo, Philippe ULg

in Naval Architect (2013)

Presentation of the EMSHIP - Erasmus Mundus Programme

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See detailOptimization of Shipyard Space Allocation and Scheduling using Heuristic Algorithm
Caprace, Jean-David ULg; Petcu, Cristian ULg; Velarde, Marco et al

in Journal of Marine Science & Technology (2013), 18(3), 404-417

In this paper we describe the development of a tool that allows planners to efficiently and effectively plan space within valuable areas of a shipyard. Traditionally, space is considered as resource ... [more ▼]

In this paper we describe the development of a tool that allows planners to efficiently and effectively plan space within valuable areas of a shipyard. Traditionally, space is considered as resource; however, it is difficult to accurately account for and plan its consumption with the current planning software tools available. The spatial scheduling tool described in this paper can be used by planners to manually or automatically reserve space within the shipyard for construction of large blocks over the entire ship erection period. The software is coupled with a heuristic optimization solver which is inspired by an algorithm used for "3D bin-packing problems". The result is the ability to efficiently generate and compare multiple space allocation alternatives in a reduced time with the ultimate goal of maintaining the critical ship erection schedule. Better solution than manual or semi-automatic allocation of blocks can be obtained through the optimization module. [less ▲]

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See detailRESILIENCE TO FLOODING – DRAFT BUILDING CODE
Clarkson, John; Rigo, Philippe ULg; Braun, Desoto-Duncan, Forsyth, de Gijt, Huber6, Miller, Sullivan, WG139

in International Conference on Flood Resilience (ICFR) : Experiences in Asia and Europe (2013, September)

A significant issue associated Flood Defence Systems (FDS) is the difficulty of predicting how these structures will behave when inevitably they have been loaded beyond their designed capacity by a flood ... [more ▼]

A significant issue associated Flood Defence Systems (FDS) is the difficulty of predicting how these structures will behave when inevitably they have been loaded beyond their designed capacity by a flood. The flood can cause these structures to fail catastrophically with loss of life and substantial damage to property. For a limited incremental investment, by including resilient features shown in this document, the FDS can dramatically lessen the chances for loss of life and property damage. While not a building code, the following provides guidance on how to improve the resilience of FDS so they will not fail catastrophically when overloaded beyond their designed capacity. Of all “lessons learnt” most important is to explicitly incorporate the consequences of failure and the possibility of being wrong in one's assumptions into the design process. Building in the flood plain will always have risk; the public should not become over confident just because a FDS is place. While it is recognized that an Integrated Water Basin perspective would include retention zones, restricted developments in flood plains, land use planning, awareness raising, flood resistant construction, drainage and water storage improvement, effective evacuation planning and other measures. [less ▲]

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See detailASimplified Analytical Method for Estimating the Crushing Resistance of an Inclined Ship Side
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Marine Structures (2013)

This paper provides a new contribution to the simplified analytical treatment of collisions between two ships. It is directly connected to the well-known super-elements method, which is a simplified ... [more ▼]

This paper provides a new contribution to the simplified analytical treatment of collisions between two ships. It is directly connected to the well-known super-elements method, which is a simplified procedure allowing for a quick estimation of the damages caused to both the striking and struck vessels during such events. In this article, a new analytical formulation is presented for estimating the impact resistance provided by inclined ship side panels. Two different scenarios are treated. We first deal with the case of an impact between the oblique plate and the stem of the striking ship, and then we consider the situation where the inclined panel is impacted by the bulb. For these two scenarios, an analytical formulation relating the force and the penetration is provided and these developments are validated by comparing them to the results of finite elements simulations. Finally, the new inclined plate super-element is integrated in a simplified model of a frigate collided by another ship, and the resistance given by the superelements method is then compared to the one obtained by a numerical simulation of this collision. [less ▲]

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See detailStudy on alternative approaches to corrosion protection of ballast tanks using an economic model
De Baere, Kris; Verstraelen, Helen; Rigo, Philippe ULg et al

in Marine Structures (2013), 32

One of the most relevant problems in ship construction and maintenance nowadays is corrosion in ballast tanks of modern merchant vessels. On the one hand, there is a general consensus that the economic ... [more ▼]

One of the most relevant problems in ship construction and maintenance nowadays is corrosion in ballast tanks of modern merchant vessels. On the one hand, there is a general consensus that the economic lifespan of such a vessel depends, to a large degree, upon the corrosion state of its ballast tanks, while on the other hand these ballast tanks, located between the outer hull and the cargo tanks, makes routine inspection and maintenance a difficult task. Today, ship's ballast tanks are usually constructed in steel and protected with an epoxy coating backed up by sacrificial zinc anodes. Such a construction has been applied without significant alterations for many years. The objective of this economic study is to compare this construction method with some potential alternatives. The considered alternatives are: (1) an increase in structural scantlings, eliminating the necessity to replace corroded at a cost of real cargo carrying capacity of the ship, (2) application of the novel and more durable TSCF25 coating (3), the use of corrosion resistant steel in ship construction and (4) a standard PSPC15 coating combined with lifetime lasting aluminum sacrificial anodes. A cost model was used to evaluate these alternative options together with sensitivity analysis. It is concluded that the durable coating and the use of lifetime lasting aluminum anodes are bound to improve the actual basic tank concept. Corrosion resistant steel becomes attractive when the steel price becomes competitive. [less ▲]

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See detailA Simplified Procedure to Assess the Strength of a Ship Impacting a Lock Miter Gate
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering (2013, June 09)

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See detailFast Strength Assessment of Mitre Gates to Ship Impact
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in International Journal of Crashworthiness (2013)

Fast Strength Assessment of Mitre Gates to Ship Impact

Detailed reference viewed: 38 (11 ULg)