AN IMPROVED METHODOLOGY FOR THE VIRTUAL POINT TRANSFORMATION OF MEASURED FREQUENCY RESPONSE FUNCTIONS IN DYNAMIC SUBSTRUCTURING

By M. V. D. Seijs, D. V. Bosch, Daniel J. Rixen, D. De, Klerk. 2013

77 citations recorded by the source corpus.

Dynamic Substructuring methods play a significant role in the analysis of todays complex systems. Crucial in Dynamic Substructuring is the correct definition of the interfaces of the subsystems and the connectivity between them. Although this is straightforward practice for numerical finite element models, the experimental equivalent remains challenging. One of the issues is the coupling of the rotations at the interface points that cannot be measured directly. This work presents a further extension of the virtual point transformation that is based on the Equivalent Multi-Point Connection (EMPC) method and Interface Deformation Mode (IDM) filtering. The Dynamics Substructuring equations are derived for the weakened interface problem. Different ways to minimise the residuals caused by the IDM filtering will be introduced, resulting in a controllable weighting of measured Frequency Response Functions (FRFs). Also some practical issues are discussed related to the measurement preparation and post-processing. Special attention is given to sensor and impact positioning. New coherencelike indicators are introduced to quantify the consistency of the transformation procedures: sensor consistency, impact consistency and reciprocity.

Subfields: Industrial and Manufacturing Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/ed00008bad1bad38a7fb1932561e0d6e641cc0d8

Citations in the corpus