References of "Buldgen, Loïc"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailNumerical crashworthiness analysis of an offshore wind turbine monopile impacted by a ship
Bela, Andreea ULg; Le Sourne, Hervé; Buldgen, Loïc ULg et al

in Shenoi, R Ajit; Soares, Carlos Guedes (Eds.) Analysis and Design of Marine Structures (2015, March)

The consequences of collision events can range from minor structural damages of the supporting structure to complete collapse of the wind turbine, which may lead to disruptions of the electricity ... [more ▼]

The consequences of collision events can range from minor structural damages of the supporting structure to complete collapse of the wind turbine, which may lead to disruptions of the electricity production and, at worst, to sinking of the striking ship with probability of loss of human lives or/and pollution. For all these reasons, a collision risk analysis becomes mandatory at the pre-design stage in order to identify the collision scenarios having the greatest probabilities of occurrence, to estimate the consequences of collision events and to ensure safe operations through the wind farm service life. The goal of this paper is to outline the behavior of the monopile foundations during ship collision by performing non-linear finite element simulations. Many collision scenarios are analyzed in order to study the sensitivity of the monopile to various parameters like impact striking ship velocity, nacelle mass, wind direction, soil stiffness, vertical location of the impact point, wind orientation … The internal energy dissipated by deformation of the monopile, the crushing force and the indentation of the crushed area are compared for different situations, as well as the overall displacements of the supporting structure. [less ▲]

Detailed reference viewed: 46 (16 ULg)
Full Text
See detailSimplified analytical methods for the crashworthiness and the seismic design of lock gates
Buldgen, Loïc ULg

Doctoral thesis (2015)

The PhD dissertation aims to provide simplified tools based on analytical formulations in order to ease the pre-design of lock gates. The first part of the thesis is devoted to ship collisions. The ... [more ▼]

The PhD dissertation aims to provide simplified tools based on analytical formulations in order to ease the pre-design of lock gates. The first part of the thesis is devoted to ship collisions. The resistance of the impacted gate is evaluated by combining global and local deforming modes. In the second part of the dissertation, an analytical solution is proposed to estimate the total hydrodynamic pressure acting on a lock gate during a seism, with due consideration for the fluid-structure coupling. Numerical validations are proposed for both ship collisions and earthquakes. [less ▲]

Detailed reference viewed: 103 (22 ULg)
Full Text
Peer Reviewed
See detailA review of technical solutions and simulations approaches for ship collisions with lock gates
Ehlers, S; Le Sourne, H; Buldgen, Loïc ULg et al

in Ship Technology Research = Schiffstechnik (2015), 62

Development of Analytical method sto assess the ship impact on lock gates

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 26 (4 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 26 (9 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 43 (15 ULg)
Full Text
Peer Reviewed
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)

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailExtension of the Super-Elements to the Analysis of a Jacket Impacted by a Ship
Buldgen, Loïc ULg; Le Sourne, Hervé; Pire, Timothée ULg

in Marine Structures (2014)

Detailed reference viewed: 24 (5 ULg)
Full Text
Peer Reviewed
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)

Detailed reference viewed: 41 (13 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 33 (7 ULg)
Full Text
Peer Reviewed
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)

Detailed reference viewed: 34 (11 ULg)
Full Text
Peer Reviewed
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: 43 (13 ULg)
Full Text
Peer Reviewed
See detailA new super-element for estimating the collision resistance of an inclined ship side
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Advancements in Marine Structures : Proceedings of MARSTRUCT 2013, the 4th International Conference on Marine Structures, Espoo, Finland, 25th – 27th March 2013 (2013)

Detailed reference viewed: 39 (6 ULg)
Full Text
Peer Reviewed
See detailA Simplified Assessment of Ship Impact on Navigation Lock Gates
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Proceedings of the fourth International Conference on Estuaries and Coasts (2012, October 26)

Detailed reference viewed: 29 (4 ULg)
Full Text
Peer Reviewed
See detailExtension of the Super-Elements Method to the Analysis of Oblique Collision Between Two Ships
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Marine Structures (2012)

Extension of the Super-Elements Method to the Analysis of Oblique Collision Between Two Ships

Detailed reference viewed: 52 (11 ULg)
Full Text
Peer Reviewed
See detailSimplified analytical method for estimating the resistance of lock gates to ship impacts
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Journal of Applied Mathematics (2012)

Detailed reference viewed: 53 (6 ULg)
Full Text
Peer Reviewed
See detailOptimization of monopile offshore wind structures
Thiry, Arnaud; Rigo, Philippe ULg; Buldgen, Loïc ULg et al

in Marstruct (2011)

ABSTRACT: As industrialization is essential for large-scale offshore wind deployment, a computerized methodology to optimize the scantling of monopile steel structures has been developed using a genetic ... [more ▼]

ABSTRACT: As industrialization is essential for large-scale offshore wind deployment, a computerized methodology to optimize the scantling of monopile steel structures has been developed using a genetic alg rithm. The objective functions of this tool are minimization of the structure weight and production costs. The constraints implemented are mainly related to structural stability under extreme loads, resonance check of the wind turbine support and fatigue strength at welded connections between shells and stiffeners. This optimiz tion should be invoked at the preliminary stage of the offshore project in order to assess the impacts of the structure design on the fabrication and installation costs. [less ▲]

Detailed reference viewed: 155 (14 ULg)
Full Text
Peer Reviewed
See detailDesign of River Navigation weirs and Flood Protection Barriers
Rigo, Philippe ULg; Sarghiuta, Radu; Herbillon, Vincent ULg et al

in 78th ICOLD Annual Meeting - Hanoi 2010 (2010, May 23)

The aim of the WG (Working Group) was to conduct a comprehensive review (state-of-the-art) of the modern technologies, design tools and recent research used to design and build structures controlling ... [more ▼]

The aim of the WG (Working Group) was to conduct a comprehensive review (state-of-the-art) of the modern technologies, design tools and recent research used to design and build structures controlling water level and flow in rivers, waterways and ports (for navigation & flood protection). The WG considered regulatory structures such as: - Gates controlling water level and flow in rivers (even non navigable) and waterways (lifting gate, tilting gate, radial gate, sector, etc.; designed in one piece or with an upper flap). These are referred to as WEIRS. - Gates controlling water level and flow in estuaries with regards to high tides and storms (lifting gate, articulated, tilting, rolling, floating, sliding, etc.). These structures are referred to as BARRIERS. [less ▲]

Detailed reference viewed: 169 (9 ULg)
Full Text
See detailAnalyse des portes d'écluse sous sollicitation sismique
Buldgen, Loïc ULg

Master's dissertation (2010)

Detailed reference viewed: 55 (6 ULg)