Results 241 to 250 of about 28,665,543 (293)

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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Modal Truncation in Experimental Modal Analysis

2018
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
Tarpø, Marius Glindtvad, Vigsø, Michael, Brincker, Rune   +2 more
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Experimental acoustic modal analysis of a tenor saxophone

The Journal of the Acoustical Society of America, 2022
This paper presents an application of the Experimental Acoustic Modal Analysis (AMA) on a vintage 10 M Conn tenor saxophone. This technique originates from the traditional Modal Analysis which is commonly adopted to determine the dynamic behaviour of solid structures. The methodology is based on the measurement of Frequency Response Functions (FRFs) as
D. E. Lucchetta, L. Schiaroli, G. Battista, M. Martarelli, P. Castellini   +4 more
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Experimental Modal Analysis of an In-situ Clavicle

2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019
Clavicle fractures are widespread, and the understanding of their mechanism of occurrence via dynamic loading is important for prevention and design of protection systems. The proposed work will find the natural frequencies and mode shapes of the human clavicles in-situ, by employing experimental modal analysis (EMA) techniques on cadaver clavicles ...
Razvan A. Rusovici, Daniel B. Topping, Sven E. S. Eriksson, Daralys L. Lopez   +3 more
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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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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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Uncertainty propagation in Experimental Modal Analysis

2014
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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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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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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