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Experts

Scientific Adviser : Marine Hydrodynamics

Bernard Molin Graduate from Ecole Polytechnique of Paris Master of Science in Naval Architecture (U.C. Berkeley) Doctor of Engineering (ENSM Nantes) My research activities have been mainly concerned with nonlinear hydrodynamics (drift forces, slow drift motion, high frequency loads and response), and development of computer models for the French offshore industry, in particular for DIODORE product. Recent involvement includes hydrodynamics of perforated structures, Vortex Induced Vibrations, slamming, moonpool resonances, hydroelastic responses, run-up effects, model testing.

Structural Mechanics - Homogenization and multiscale approaches

Natacha Buannic PhD in Structural Mechanics (Ecole Centrale de Nantes) Graduated from ICAM de Nantes as Engineer in Mechanics I am involved in Ship projects (Civil and Naval ships), as well as some structural aspects in oil and gas application and nuclear field. My competences and areas of expertise are in Finite Element structural analysis, Fatigue life assessment of steel and elastomeric components, Use and development of multiscale (micro/macro) approaches and homogenization methods, Optimisation for advanced detail design, Dynamic response of ships, Hull vibration assessment, and lastly Modeling of accidental and extreme loads (ship collision, explosion,…) I am member of ISSC Committee: after a first mandate in Committee “Quasi Static”, I am now involved in Committee “Accidental events in offshore structure”

Computational Fluid Dynamic (CFD)

Christine de Jouette PhD in Fluid Mechanics (Nice/Sophia Antipolis University) Graduated from Ecole Centrale de Nantes in Fluids Mechanics My works were at the origin of the development of the in-house Computational Fluid Dynamics software EOLE. I have been responsible for the development of EOLE software for 12 years. During 21 years at Principia, I became an expert of numerical Fluid Mechanics for different industrial applications, in particular for naval and offshore activities: Hydrodynamic performance of hull and appendages, Liquid motions in ballast and storage tanks, Impacts loads and slamming, Design and optimisation anti-roll devices, numerical investigations on viscous damping with free surface for naval and offshore structures, Vortex Induced Vibrations. I am involved in Marine Renewable Energy projects (OTEC and OWEC). In charge of training course in engineering schools ENSTA, ISITV

Marine Hydrodynamics, Ocean Engineering,

Christian Berhault PhD in Ocean Engineering (Ecole Centrale de Nantes). 14th years (IFP) of R&D and software development in the field of offshore floating structures for oil & gas industry (Diodore, DeepLines): wave loads, sea-keeping, mooring and risers behaviours (slow drift, ringing/whipping, slamming, sloshing, viscous roll and drift damping, vortex induced vibrations and motions). Since 1990 in Principia, with application of the acquired expertise in naval engineering (civil and defence): ship dynamic stability and stabilization systems, ships and submarines sea-keeping. Expertise provided on the major deep offshore projects concerning design of oil production systems, marine operations. Support for design of renewable marine energy systems. Large experience in model testing : towing tank and offshore basin. In charge of training course in engineering schools : ENSPM, ECN

Subsea Umbilicals Risers and Flowlines

Jean-Michel Heurtier Graduated from Ecole Centrale de Paris (ECP) in Physics I initially spent seven years at Institut Français du Pétrole (IFP) as responsible for the development of DEEPLINES (Finite Element model dedicated to the design of slender structures like production or drilling risers, mooring lines or umbilical). I joined PRINCIPIA in 2001 as expert in dynamic analysis under extreme conditions, Fatigue Life evaluation under wave/wind/current loadings as well as Vortex Induced Vibrations.

Computational Fluid Dynamic (CFD)

Richard Marcer PhD in Fluid Mechanics (Institut de Mécanique des Fluides de Marseille) CFD Expert at PRINCIPIA since 1996 and actual responsible of the EOLE code, my expertise deals with the modelling and the validation of physical and numerical models allowing to simulate complex phenomena such like, multi-phases flows, free surface evolution, cavitation, turbulence, wave modelling and wave-breaking, fluid-structure (rigid) coupling, fluid-thermic coupling, thermal transfer with condensation, jet break-up,... My expertise, as the one gained by the CFD team, is associated with the development of the EOLE which is used in most of our projects. In charge of training course in engineering schools ISITV and UTV

Subsea Umbilicals Risers and Flowlines

Cédric Le Cunff PhD in Mechanical and Aerospace Engineering Graduated from Ecole Centrale de Lyon in Mechanical Engineering After six years at Institut Français du Pétrole, I joined Principia in 2004 in Houston office (USA). For the past eleven years, I have been working on Vortex-Induced Vibrations (VIV), fatigue of risers and mooring lines . I have also been involved in numerous projects for the offshore industry to evaluate field design or solve specific problems. Those experiences are used to enhance the finite elements code DEEPLINES. As part of the development team, I worked for instance on the VIV and fatigue modules, as well as line/floater coupled analysis in frequency domain.

Structural Analysis, ultimate strength

Tanguy Quesnel Graduated from Université Technologique de Compiègne. Since about twenty years in PRINCIPIA, I acquired an expertise in analysis of the mechanical behaviour of the structures. This expertise have been applied to naval, offshore, nuclear energy. My skill, based on a control of numerical structural computations, covers the following aspects : Mechanical behaviour of structures linear and non-linear (platicity and contact), metallic and composite materials, coupling with fluid and thermal effects, Multi-scale problems and ultimate strength. This expertise is used with best in class products such as ABAQUS, ANSYS, LS-DYNA and PERMAS.

Seakeeping and manoeuvring

Bruno Lecuyer Graduated from ENSIETA in Naval Architecture and hydrodynamics My competence is on the modelling and numerical simulation of the marine behavior of ships and anchored structures. With a 10-years experience between software development and studies on various projects for the main actors of the offshore and maritime domain, I have acquired a wide range of concepts which I integrate in numerical models : stability, environmental loads, seakeeping, mooring, manoeuvrability, propulsion, stabilization, ... This expertise is capitalized in the hydrodynamic software DIODORE, and in the manoeuvring simulator MANDOLINE. In charge of training course in engineering schools : ENSIETA, Ecole Navale

Fast dynamics : Fluid / Structure impacts

Nicolas Couty PhD in Fast dynamics My expertise, acquired in about 10 years, concerns fluid-structure interactions, especially with deformable solids. My expertise is focused on fluid-structure effects in transient phenomena, and fluid-structure impacts. This includes sloshing and slamming impacts, drops of structures on liquids, underwater explosions, blast, where compressible effects in fluids. These transient phenomena induce subsequent vibrations of structures in presence of liquids that are also analyzed. The main software used is LS-DYNA.

Structural analysis

Gilles Bechepay Graduated from Ecole Speciale des Travaux Publics Graduated from Center of High Studies of Metals Since about twenty years in PRINCIPIA, I acquired an expertise in analysis of the mechanical behaviour of the structures. This expertise have been applied to naval, offshore, nuclear energy. My skill, based on a control of numerical structural computations, covers the following aspects : Mechanical behaviour of structures linear and non-linear (platicity and contact), metallic and composite materials, coupling with fluid and thermal effects, Multi-scale problems and ultimate strength. This expertise is used with best in class products such as ABAQUS, ANSYS, LS-DYNA and PERMAS.