By Luciana Balsamo, Suparno Mukhopadhyay, Raimondo Betti (auth.), Randall Allemang, James De Clerck, Christopher Niezrecki, Alfred Wicks (eds.)
Topics in Modal Analysis, quantity 7: court cases of the 31st IMAC, A convention and Exposition on Structural Dynamics, 2013, the 7th quantity of 7 from the convention, brings jointly contributions to this crucial zone of study and engineering. the gathering provides early findings and case reports on basic and utilized features of Structural Dynamics, together with papers on:
Fluid constitution Interaction
Adaptive Structures
Experimental Techniques
Analytical Methods
Damage Detection
Damping of fabrics & Members
Modal Parameter Identification
Modal checking out Methods
System Identification
Active Control
Modal Parameter Estimation
Processing Modal Data
Read Online or Download Topics in Modal Analysis, Volume 7: Proceedings of the 31st IMAC, A Conference on Structural Dynamics, 2013 PDF
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Additional info for Topics in Modal Analysis, Volume 7: Proceedings of the 31st IMAC, A Conference on Structural Dynamics, 2013
Sample text
K. Papagiannakis 17. Gordis JH (1994) An analysis of the improved reduced system model reduction procedure. Int J Anal Exp Modal Anal 9(4):269–285 18. Gordis JH (1995) An exact formulation for structural dynamic model error localization. Int J Anal Exp Modal Anal 10(1):19–33 19. Berman EJ, Allen MS, Kammer DC, Mayes RL (2010) Probabilistic investigation of sensitivities of advanced test-analysis model correlation methods. J Sound Vib 329:2516–2531 20. Tu Z, Lu Y (2008) FE model updating using artificial boundary conditions with genetic algorithms.
As we will see, the set of pivot columns selected by the QR algorithm determines the ability of an ABC set to provide a localization solution. 1 Least-Norm Versus Basic Solutions We first illustrate some distinguishing characteristics of the two important classes of solution to Eq. 3) described above. We will illustrate the difference between fuln g and fuQR g with a simple numerical example. e. the right-hand side), which is fıƒg D ŒSfug D Œ0:6557; 0:0357; 0:8491T. 12) We will compare the results of the two solutions, uln and uQR .
The parameter-specific optimal ABC sets applied to the finite element model will produce increased sensitivities in the updating parameter, yielding accurate error localization and damage detection solutions. A method is developed for identifying the parameter-specific optimal ABC sets for updating or damage detection, and is based on the QR decomposition with column pivoting. Frequency response data collected from a simple laboratory experiment is used, along with the corresponding finite element-generated data, to demonstrate the effectiveness of the ABC-QR method.