Matthieu Benoit RHOMBERG

A small-scale modular vibration test bench for structural dynamic investigations

To evaluate the structural dynamic properties of structures, it is beneficial to verify the numerically predicted response by experiments. Based on experiments on models with suitable scale the behavior of the corresponding structure can be predicted numerically. The design of a small-scale three-dimensional modular frame structure at the Unit of Applied Mechanics of the University of Innsbruck serves to verify, to analyze and to visualize complex vibration phenomena of real structures.

The first three chapters of this master thesis describe design, construction and properties of the experimental model. Various variation possibilities of the experimental model are explained in detail. Subsequently, the applied excitation and measurement techniques are discussed. A thorough understanding of all measurement devices is significant because measurements are at risk for disruption by external influences that could lead to inaccurate results.

The following chapter addresses the development of a numerical model for the experimental model. Initially, the simplifications for the numerical model are discussed in detail. Then, the applied equations and relations used to calculate the model parameters and the amplitude frequency response are elaborated.

In section five the acquirement of the model parameters and the material properties needed for the calculation model is described.

In the final chapter the results of the experimental and calculation model are compared.