Applications of subdomain coupling methods to structural dynamics and multiphysics
Event details
| Date | 01.12.2017 |
| Hour | 12:15 › 13:15 |
| Speaker | Prof. Dr Michael Brun, INSA-Lyon, Lyon, France |
| Location | |
| Category | Conferences - Seminars |
Abstract: The increasing complexity of numerical models for engineering systems, taking into account ever finer mesh, accurate material models and multiphysics phenomena occurring at very different space and time scales, boosted the development of partitioning approaches. In the field of structural dynamics, the main interest of the partitioning approach is to increase computational efficiency by using different time integrators with their own time step, depending on the non-overlapping subdomains composing the global mesh. First, subdomain coupling methods have been set up, following an energy-based argument, leading to the proposition of Hybrid Asynchronous Time Integrator (HATI), stable and second or first order accurate depending on the ratio between the time scales. A large variety of applications of the HATI is then presented in the fields of structural dynamics and multiphysics: reinforced concrete subjected to earthquake or blast loading, crane bridge under earthquake loading experiencing non smooth dynamics phenomena (large number of impacts), soil structure interaction problem by introducing Perfectly Matched Layers (PML) in the HATI framework for reproducing unbounded domains, coupling a wave propagation software in soils, based on Spectral Element Method (SEM), with a FEM software for the structure, fluid structure interaction problem with the coupling of a water jet, modeled with Smooth Particle Hydrodynamics (SPH) method, impacting a FEM modeled hydroelectric turbine’s steel bucket. The last application developed within LSMS laboratory, EPFL, concerns the simulation of a sudden rock sliding contact along a seismic fault, involving HATI, contact and friction algorithms as well as PML.
Bio: Dr Michael BRUN is an associate professor at INSA-Lyon, in civil engineering laboratory GEOMAS. His research interests are focused on computational science in dynamics, applied to civil engineering structures and multiphysics coupling problems such as soil-structure and fluid-structure interactions. He got his PhD at INSA-Lyon in 2002 and worked during three years as an engineer in a private company (EC2-Modélisation, Lyon) specialized in simulations and software development. Since 2005, he has joined INSA-Lyon where he holds the position of Associate Professor, teaching continuum mechanics, strength of materials and numerical methods in the civil engineering and urban planning Department of INSA-Lyon.
Bio: Dr Michael BRUN is an associate professor at INSA-Lyon, in civil engineering laboratory GEOMAS. His research interests are focused on computational science in dynamics, applied to civil engineering structures and multiphysics coupling problems such as soil-structure and fluid-structure interactions. He got his PhD at INSA-Lyon in 2002 and worked during three years as an engineer in a private company (EC2-Modélisation, Lyon) specialized in simulations and software development. Since 2005, he has joined INSA-Lyon where he holds the position of Associate Professor, teaching continuum mechanics, strength of materials and numerical methods in the civil engineering and urban planning Department of INSA-Lyon.
Practical information
- General public
- Free
Organizer
- Prof. Dr Brice Lecampion & Prof. Dr Katrin Beyer
Contact
- Prof. Dr Jean-François Molinari