Numerical and experimental modal analysis of structures under gyroscopic influence in ALE formulation

Weidauer T, Willner K (2018)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2018

Event location: Leuven, Belgien BE

Abstract

A test set-up for the modal analysis of gyroscopic, rotationally symmetric systems is presented. It employs laser Doppler vibrometry along with automatic impulse excitation installed on a rotary table and is applied to a glass structure rotating about its figure axis. The effects of gyroscopic influences on the modal behaviour such as the split of eigenfrequencies and the treatment of complex eigenmodes as travelling waves are deduced analytically and shown experimentally. Finally numerical computations using the Arbitrary-Lagrangian-Eulerian (ALE) finite element formulation separating the rigid body rotation from the mesh deformation are conducted. With the combination of analytical, experimental and numerical analysis a broad overview of modal characteristics of gyroscopic systems is given.

Authors with CRIS profile

Tim Weidauer Professur für Strukturmechanik Kai Willner Professur für Strukturmechanik

Related research project(s)

Reduced order modelling of non-linear gyroscopic systems in ALE formulation with frictional contact Jan. 1, 2015 - Jan. 1, 2018

How to cite

APA:

Weidauer, T., & Willner, K. (2018). Numerical and experimental modal analysis of structures under gyroscopic influence in ALE formulation. In Proceedings of the ISMA2018. Leuven, Belgien, BE.

MLA:

Weidauer, Tim, and Kai Willner. "Numerical and experimental modal analysis of structures under gyroscopic influence in ALE formulation." Proceedings of the ISMA2018, Leuven, Belgien 2018.

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