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Proposing Institution

Lehrstuhl für Statik,TUM
Project Manager

PD Dr.-Ing. habil. Roland Wüchner
Theresienstraße 90
80333 München
Especially for high rise, wide span and slender civil engineering structures it is often very difficult to conduct reasonable measurements in a classical wind tunnel approach. This comes even more into play when the interaction of those structures with the air flowing around them should be studied. Therefore, the Chair of Structural Analysis is developing a numerical wind tunnel, where all of the effects can be consistently studied, which cannot be tested in an experimental wind tunnel, due to the problems with scaling laws in multiphysics applications. In the case of the developed numerical wind tunnel approach the turbulent inflow, which inherits the characteristics of natural wind, is generated by an inlet generator. Since the pressure loading on a structure due to natural wind is a non-deterministic, but a stochastic process, a certain amount of wall clock time (normally ten minutes) has to be simulated in order to be able to generate reasonable statistics for the specific problem. Furthermore, the fluid domain for a large building also has to be quite large to reduce effects from the domain’s boundary condition and fulfill certain criteria for blockage ratios. Thus, an extreme amount of computing power is necessary, since the fluid and also the structural discretization (in our code both with finite elements) contains many elements.The aim of the project Wind-structure interaction simulations for high rise, wide span and slender civil engineering structures is the prediction of effects of natural wind on civil engineering structures by fully coupled fluid-structure interation simulations. The models for certain types of buildings (e.g. Thyssenkrupp Testturm Rottweil, Olympiaturm München, Olympiadach München, DTU wind turbine) are already available and tested on the LRZ Linux cluster for their ability to run. The results of the simulations should systematically be compared to real world measurements, which are available for all of the structures mentioned. Hence, the overall project comprises goal-oriented and thorough investigation and validation of modern numerical methods for the solution of wind-structure interaction phenomena in reals-scale conditions.

Impressum, Conny Wendler