This thesis researches methods for predicting dynamic behaviour of complex structures
using frequency based substructuring. The primary goal is to predict a dynamic response
of a test structure, mounted on fixture elements, all of which will be subjected
to vibration tests. Underlying theory in formation of analytical models i.e. spatial,
modal and response model are presented. Furthermore, the thesis focuses on theoretical
basics of dynamic substructuring and corresponding methods, developed to adress
the challenges with structures, that are too big and complex for a classic approach. A
method of coupling substructures using virtual point transformation is elaborated in
more detail, and an assessment is made using multiple virtual points to perform coupling.
Prediction of dynamic response is made using dynamic substructuring coupling,
with reference to numerical model in ANSYS. Results show the dynamic response of
coupled structure using multiple virtual points in relation to the reference method.
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