Title :
Structural dynamics modeling using modal analysis: applications, trends and challenges
Author :
Van der Auweraer, Herman
Author_Institution :
LMS Int., Leuven, Belgium
Abstract :
System identification plays a crucial role in structural dynamics and vibro-acoustic system optimization. The followed approach is based on the “Modal Analysis” concept. The Eigenmodes of the system model can be visualized and allow a direct physical interpretation. Using the modal models, design improvements can be predicted and the structure optimized. The present paper not only reviews the test procedure and system identification principles of modal analysis, but also discusses the main practical problems with which engineers, performing modal analysis on industrial structures, are confronted on a daily basis. New trends in modal analysis that specifically address these problems are reviewed and illustrated with case studies. This includes the issues of instrumentation, test definition, measurement principles, and parameter estimation
Keywords :
eigenvalues and eigenfunctions; identification; modal analysis; vibrations; design optimization; eigenmode visualization; industrial structure; measurement technique; mechanical structure; modal analysis; parameter estimation; structural dynamics model; system identification; test instrumentation; vibro-acoustic system; Aircraft; Damping; Eigenvalues and eigenfunctions; Laplace equations; Modal analysis; Predictive models; Resonance; Resonant frequency; System identification; Vibrations;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.929456