Fluid-structure Interaction for Structural Design

An important eld in computational science and engineering is the simulation of the coupled problem of uid ow interacting with a moving structure. A common notation for this is uid-structure interaction (FSI) problems, which include both aeroelasticity and hydroelasticity. Such multi-physics systems have received renewed attention as a result of the increase in length of slender structures e.g. suspension bridges and ooshore risers, as well as increased simulation capabilities due to faster computers and new numerical methods. Herein we give an overview of results obtained within Fluid-Structure Interaction-Structural Design (FSI-SD) a project that is co-funded under the EC-ESPRIT IV/HPCN Simulation and Design (project number 20111). Our main ambition with the present paper is to disseminate the developed computational framework and give insight into some of the numerical challenges involved in addressing FSI-problems related to slender structures. We show that the improved simulation tool developed herein makes it possible to perform realistic numerical prediction of critical utter speed for wind induced vibrations of aerodynamic bridges.