Results 251 to 260 of about 349,012 (301)

Trends in experimental modal analysis

Mechanical Systems and Signal Processing, 1987
Abstract The scope of this paper is to comment on current trends and new developments in the field of experimental modal analysis. The first section covers modal measurement and estimation procedures, with special emphasis on the use and limitations of recent techniques such as multiple input processing, total least square, global time- and frequency
R. Snoeys, P. Sas, W. Heylen, H. Van der Auweraer   +3 more
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Nonlinearity in experimental modal analysis

Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2001
Summary: Modal analysis is established as one of the fundamental strategies in approaching structural dynamic problems. Despite its universal appeal, it is fundamentally a linear theory and cannot be applied to significantly nonlinear systems without incurring substantial difficulties in implementation and interpretation of results.
Worden, K., Tomlinson, G. R.
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Elements of Experimental Modal Analysis

2008
Fundamental concepts for the characterization of the dynamical response of SDOF and NDOF systems are provided. A description is given of the main techniques to represent the response in the frequency domain and its experimental characterization.
VESTRONI, Fabrizio, PAU, Annamaria
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A Separation Modal Method of Experimental Modal Analysis

The Shock and Vibration Digest, 1991
The test is carried out in a laboratory and the testing sample, which is a cylindrical thin-shell made of a composite, is in a free-free state.
W. Fei, X. Ll, L.-j. Shl, Y.-b. Yang
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Experimental modal analysis of bows

The Journal of the Acoustical Society of America, 2008
The vibration performances of bow instruments are usually studied developing numerical and experimental modal analyses of the body of the instrument or of their parts (tailpiece, bridge, fingerboard, neck). The dynamic contribution of the bow is less considered, but the mutual actions generated between bow and strings are conditioned by the mechanical ...
RAVINA, ENRICO, SILVESTRI, PAOLO, A. AIRENTI   +2 more
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MECHANICAL SYSTEM EXPERIMENTAL MODAL ANALYSIS

2023
challenges that are of significant importance to modal analysis test engineers are investigated. Automated modal analysis, which is being developed right now in a wide variety of facilities all over the world at the present, is to blame for the problems that have arisen as a result of it.
Ajay Kumar, Amar Saraswat, Keshavamurthy T G   +2 more
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Uncertainty propagation in Experimental Modal Analysis

As all experimental procedures, Experimental Modal Analysis (EMA) is subject to a wide range of potential testing and processing errors. The modal identification methods are sensitive to these errors, yielding modal results which are uncertain up to certain error bounds.
Peeters, Bart, Elkafafy, Mahmoud, Guillaume, Patrick, Van Der Auweraer, Herman   +3 more
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The context of experimental modal analysis

Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2001
The basic principle of describing a structure9s dynamic behaviour in terms of its vibration modes was first explored by Rayleigh over a century ago. Since then, engineers have sought to harness this powerful approach as a means of solving a wide range of practical problems in structural dynamics.
Lieven, NAJ, Ewins, DJ
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Modal Truncation in Experimental Modal Analysis

Some methods in experimental modal analysis rely on a finite set of modes and they neglect the higher modes. However, this approach causes a truncation of the modal decomposition and the modal truncation introduces errors of unknown magnitude. In this paper the effect of modal truncation is investigated on a test specimen in the laboratory. It is found
Marius Tarpø, Michael Vigsø, Rune Brincker   +2 more
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Experimental modal analysis and modal parameters extraction

2009
A case study approach in the inverse analysis of the modal extraction parameter has been implemented. The Mathematical model has been used to generate time response and random generator to generate added noise. The accuracy of modal parameters extraction techniques to error-contaminated measured data has been assessed for the simple examples.
Lozina, Željan, Sedlar, Damir, Karišik, Edin   +2 more
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