Documents published in Scipedia

• Computer Programming of free GUIs for the Analysis of the Behaviour of Marine Structures

  J. Gutiérrez Romero, Z. B, J. García-Espinosa

  Ships and Offshore Structures (2015). 11:5, 471-481 (preprint)

  
  

  Abstract

  This work presents the development of two free Graphical User Interfaces (GUI), called ''FASTLognoter'' and ''MorisonForm'', both focused on the analysis of the behaviour of offshore structures, especially of offshore wind turbines. The first one is related to the aeroelastic analysis of wind turbines, and the second is concerned with the seakeeping of marine structures. The development of these tools has been carried out using a powerful software called ''Lognoter''. This tool is free software for Knowledge Management in Technology (KMT), which integrates computer programming for allowing the development of GUIs. These GUIs give an open platform for conducting a parametric study of the structural and dynamic behaviour of marine structures. Their coupling permits the user to set a suitable way to evaluate new concepts in marine structures. Finally, an application for the intensive analysis of offshore wind turbines is shown.

  Abstract
  This work presents the development of two free Graphical User Interfaces (GUI), called ''FASTLognoter'' and ''MorisonForm'', both focused on [...]

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• Lagrangian finite element model for the 3D simulation of glass forming processes

  P. Ryzhakov, J. García-Espinosa, E. Oñate

  Computers and Structures (2016). 117, 126-140 (preprint)

  
  

  Abstract

  We propose here a numerical model for a three-dimensional simulation of glass forming processes. Using the basic philosophy of the Particle Finite Element method (PFEM), we introduce several new features adapting the strategy to suit the problem of interest. A modified fractional step method for the solution of the flow equations is applied. This approach, on the one hand, inherits the computational efficiency of the original fractional step approach, and on the other hand shows better mass conservation features. These features are particularly attractive taking into account the importance of the correct prediction of the glass product's wall thickness. A smart mesh update strategy and a simple mechanical contact scheme are introduced. In order to account for temperature-dependent viscosity, the heat equation is coupled to the mechanical model. Viscosity is obtained from the temperature field via an empirical law. The model is validated and an example modeling the processes in the final blow mold of the bottle manufacturing process is proposed.

  Abstract
  We propose here a numerical model for a three-dimensional simulation of glass forming processes. Using the basic philosophy of the Particle Finite Element method (PFEM), we [...]

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• Development of a decision support system for optimization of the performance of sailing yachts

  J. García-Espinosa, I. Ortigosa, A. Fernández

  Rev. int. métodos numér. cálc. diseño ing. (2015). Vol. 31, (3)

  
  

  Abstract

  In this paper, the conception and design of a new monitoring system for a racing yachts rig is presented. The sensors developed are able to process the measured strain data, by applying artificial neural networks (ANN) algorithms, and then evaluate the load acting on an element and identify the direction of the action of that force. This way, it is possible to identify the actual operating conditions of the yacht rig. The required data for ANN training is generated from the results obtained from different finite element method (FEM) computational models of the device. Furthermore, during the design phase of the system, different experimental campaigns were carried out. The experimental tests were designed to serve as proof of concept, as well as to validate the different procedures used in the system development and application. The developed monitoring system is wireless, low-intrusive and easily adaptable to any yacht configuration. This work also presents the integration of the monitoring system into a coupled fluid-structure computation model for the sails and rig of a boat. The resulting system is an efficient tool for evaluating performance and decision support in the adjustment of a sailboat rig.

  Abstract
  In this paper, the conception and design of a new monitoring system for a racing yachts rig is presented. The sensors developed are able to process the measured strain data, [...]

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• A finite element method for fluid-structure interaction with surface waves

  E. Oñate, J. García-Espinosa

  (2001). Trends in Computational Structural Mechanics. W. A. Wall, K.-U. Bletzinger and K. Schweizerhof (Eds.), CIMNE, Barcelona, Spain

  
  

  Abstract

  A stabilized semi-implicit fractional step finite element method for solving coupled fluid-structure interaction problems involving free surface waves is presented. The stabilized equations are derived at a differential level via a finite element calculus procedure. A new mesh updating technique based on solving a fictitious elastic problem on the moving mesh is described. One example of the efficiency of the stabilized semi-implicit algorithm for the coupled solution of fluid-structure interaction problems is presented.

  Abstract
  A stabilized semi-implicit fractional step finite element method for solving coupled fluid-structure interaction problems involving free surface waves is presented. The stabilized [...]

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• A FEM fluid-structure interaction algorithm for analysis of the seal dynamics of a Surface-Effect Ship

  J. García-Espinosa, B. Servan Camas, E. Oñate, D. Di Capua, P. Ubach de Fuentes

  Comp. Meth. App. Mech. Eng. (2015). 295, 290-304 (preprint)

  
  

  Abstract

  This paper shows the recent work of the authors in the development of a time-domain FEM model for evaluation of the seal dynamics of a surface effect ship. The fluid solver developed for this purpose, uses a potential flow approach along with a stream-line integration of the free surface. The paper focuses on the free surface-structure algorithm that has been developed to allow the simulation of the complex and highly dynamic behavior of the seals in the interface between the air cushion, and the water. The developed fluid-structure interaction solver is based, on one side, on an implicit iteration algorithm, communicating pressure forces and displacements of the seals at memory level and, on the other side, on an innovative wetting and drying scheme able to predict the water action on the seals. The stability of the iterative scheme is improved by means of relaxation, and the convergence is accelerated using Aitken’s method. Several validations against experimental results have been carried out to demonstrate the developed algorithm.  

  Abstract
  This paper shows the recent work of the authors in the development of a time-domain FEM model for evaluation of the seal dynamics of a surface effect ship. The fluid solver [...]

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Articles (Documents not available in Scipedia)

• Estudio dinámico de líneas de fondeo en plataformas flotantes de aerogeneradores marinos

  J. García-Espinosa

  Ingeniería naval, 66-72, 2014

• Avances en el desarrollo de un modelo de elementos finitos para evaluación de un buque de efecto superficie

  J. García-Espinosa, B. Serván, D. Di Capua, P.A. Ubach, E. Oñate

  Ingeniería naval, 922: 68-73

• Estudio del Comportamiento Dinámico Acoplado en Estructuras Offshore

  JEG Romero, BZ Parra, JG Espinosa, JAE Pérez

  Anuario de Jóvenes Investigadores, 39-41, 2014

• Prediction of total resistance coefficients using neural networks

  I Ortigosa, R López, J García

  Journal of Maritime Research 6 (3), 15-26

• Dynamic modelling of mooring for floating offshore structures

  JE Gutiérrez Romero, B Zamora Parra, J García Espinosa, J Esteve

  Computational Methods in Marine Engineering V-Proceedings of the 5th ..., 2013

• Desarrollo de un conjunto de herramientas para el análisis acoplado de aerogeneradores en alta mar

  JE Gutiérrez Romero, B Zamora, J García Espinosa, J Esteve Pérez

  Ingeniería naval, 62-75, 2013

• Stabilized finite element methods for convection-diffusion-reaction, Helmholtz and Stokes problems

  P Nadukandi

  Universitat Politècnica de Catalunya, 2011

• A family of residual‐based stabilized finite element methods for Stokes flows

  E Oñate, P Nadukandi, SR Idelsohn, J García, C Felippa

  International Journal for Numerical Methods in Fluids 65 (1‐3), 106-134, 2011

• Experiencias en el desarrollo y aplicación de herramientas de cálculo y verificación de estructuras marinas para generación de energía

  J García Espinosa, B Serván Camas, D Sá

  49º Congreso de Ingeniería Naval e Industria Marítima, 1-16, 2010

• Análisis estructural del efecto de explosiones a bordo de buques de pasaje

  J García-Espinosa, D Di Capua, D Sá, S Honrubia, F Viejo, E Oñate, R Marí, ...

  Ingeniería naval, 105-114, 2007

• ODD Level Set: A new method for simulation of free surface problems

  JG Espinosa, AV Tomás

  Journal of maritime research 3 (1), 27-40, 2006

• Análisis CFD del movimiento de balance de un portacontenedores

  J García-Espinosa, E Oñate, JB Helmers, MR Chakkor

  Ingeniería Naval, abril, 2004

• Ship hydrodynamics

  E Onate, J García, SR Idelsohn

  Encyclopedia of computational mechanics, 2004

• A methodology for analysis of fluid-structure interaction accounting for free surface waves

  E Oñate, J García, S Idelsohn

  European Conference on Computational Mechanics (ECCM99), 1999

• A stabilized numerical method for analysis of ship hydrodynamics

  J García, E Oñate, H Sierra, C Sacco, S Idelsohn

  Computational fluid dynamics'98, 664-669, 1998

• An alpha-adaptive approach for stabilized finite element solution of advective-diffusive problems with sharp gradients

  E Onate, J García-Espinosa, S Idelsohn

  Computational fluid dynamics'98, 748-753, 1998

• On the stabilization of numerical solution for advective-diffusive transport and fluid flow problems

  E Oñate, J García, S Idelsohn

  Centro Internacional de Métodos Numéricos en Ingeniería, 1996

Books, book chapters and edited books (Documents not available in Scipedia)

• MARINE 2011, IV International Conferencn Marine Engineering: Selected Papers

  L. Eca, E. Oñate, J. García-Espinosa, T. Kvamsdal, P. Bergan

  Springer

• Fluid-Structure interaction applied to blood flow simulations

  E. Soudah, E. Oñate, J. García-Espinosa, J. S. Pérez, A. Mena, E. Heindenreich, J. F. Rodríguez, M. A. Martínez, M. Doblaré

  Advances in Computational Vision and Medical Image Processing, Springer

• Computational Methods in Marine Engineering III (MARINE 2009)

  P. Bergan, B. Pettersen, T. Kvamsdal, E. Oñate, J. García-Espinosa

  CIMNE

• Computational Methods in Marine Engineering II (MARINE 2007)

  P. Bergan, J. García-Espinosa, P. Kvamsdal, T. Kvamsdal, E. Oñate

  CIMNE

• LES turbulence models. Relation with stabilized numerical methods

  A. Valls, J. Garcia-Espinosa, E. Oñate

  Models, Experiments and Computation in Turbulence, CIMNE

• Computational Methods in Marine Engineering (MARINE 2005)

  P. Bergan, J. García-Espinosa, E. Oñate, T. Kvamsdal

  CIMNE

• A general stabilized formulation for incompressible fluid flow using finite calculus and the finite element method

  E. Onate, J. Garcia-Espinosa, G. Bugeda, S.R. Idelsohn

  Fluid dynamics and aeronautics new challenges: a book dedicated to Pierre Perrier. J. Periaux, D. Chamption, O. Pironneau, P.H. Thomas, eds.

Conference papers and presentations (Documents not available in Scipedia)

• A finite element method for fluid-structure interaction with surface waves

  J. Garcia-Espinosa and E. Oñate

  Proceedings of the European Conference on Computational Mechanics (ECCM 2001)

• Finite element analysis of incompressible flows with free surface waves using a finite calculus formulation

  E. Oñate, J. García-Espinosa

  Proceedings of the VI European Congress in Computational Methods in Applied Sciences and Engineering (ECCOMAS 2001)

Technical reports, thesis and other (Documents not available in Scipedia)

• Desarrollo de herramientas de autoaprendizaje multimedia para cálculo de estructuras por ordenador en ingeniería

  J. García-Espinosa, J. Martínez, D. Yebra, M. Cervera Ruiz, E. Oñate, S. Oller, B. Suárez

  Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013