ROVŠČEK, Domen ;SLAVIČ, Janko ;BOLTEŽAR, Miha . Tuned-sinusoidal method for operational modal analysis of small and light structures. Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 60, n.3, p. 187-194, june 2018. ISSN 0039-2480. Available at: <https://www.sv-jme.eu/article/tuned-sinusoidal-method-for-operational-modal-analysis-of-small-and-light-structures/>. Date accessed: 20 dec. 2024. doi:http://dx.doi.org/10.5545/sv-jme.2013.1371.
Rovšček, D., Slavič, J., & Boltežar, M. (2014). Tuned-sinusoidal method for operational modal analysis of small and light structures. Strojniški vestnik - Journal of Mechanical Engineering, 60(3), 187-194. doi:http://dx.doi.org/10.5545/sv-jme.2013.1371
@article{sv-jmesv-jme.2013.1371,
author = {Domen Rovšček and Janko Slavič and Miha Boltežar},
title = {Tuned-sinusoidal method for operational modal analysis of small and light structures},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {60},
number = {3},
year = {2014},
keywords = {operational modal analysis; tuned-sinusoidal method; mode shape normalisation; small and light structures; single response; acoustic excitation},
abstract = {Small and light structures have some distinctive features that intensify the difficulties of measuring their modal parameters. The mass that is added to the structure by the sensors cannot be neglected and the resonant frequencies are usually relatively high, therefore a wide frequency range of measurement is needed. There are also difficulties with assuring the proper excitation, so that all the measured modes are excited well and that at the same time the excitation level is not too large, which would cause larger response of the structure than the measuring ranges of the sensors can cover. In this study an innovative method for operational modal analysis of small and light structures is presented. The method is non-contact, therefore there is no added mass of the sensors to the structure. The structure is acoustically excited with a pure sine signal that is tuned to each resonant frequency. A single response measurement with the Laser Doppler Vibrometer in individual points is needed to determine the modal parameters. A mass-change strategy is used for the mass-normalisation of the measured mode shapes. The main contribution of the presented method compared to other similar methods is that the mode shapes are better accentuated (due to sine excitation), which can improve the results of the modal analysis on small and light structures, where the response of the structure is weak. The method is also easy to perform, because only a single response measurement is needed for each point and the excitation force does not need to be measured. The presented method gives accurate results, which was confirmed with the comparison of the experimental and the numerical results on a sample of simple geometry.},
issn = {0039-2480}, pages = {187-194}, doi = {10.5545/sv-jme.2013.1371},
url = {https://www.sv-jme.eu/article/tuned-sinusoidal-method-for-operational-modal-analysis-of-small-and-light-structures/}
}
Rovšček, D.,Slavič, J.,Boltežar, M. 2014 June 60. Tuned-sinusoidal method for operational modal analysis of small and light structures. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 60:3
%A Rovšček, Domen %A Slavič, Janko %A Boltežar, Miha %D 2014 %T Tuned-sinusoidal method for operational modal analysis of small and light structures %B 2014 %9 operational modal analysis; tuned-sinusoidal method; mode shape normalisation; small and light structures; single response; acoustic excitation %! Tuned-sinusoidal method for operational modal analysis of small and light structures %K operational modal analysis; tuned-sinusoidal method; mode shape normalisation; small and light structures; single response; acoustic excitation %X Small and light structures have some distinctive features that intensify the difficulties of measuring their modal parameters. The mass that is added to the structure by the sensors cannot be neglected and the resonant frequencies are usually relatively high, therefore a wide frequency range of measurement is needed. There are also difficulties with assuring the proper excitation, so that all the measured modes are excited well and that at the same time the excitation level is not too large, which would cause larger response of the structure than the measuring ranges of the sensors can cover. In this study an innovative method for operational modal analysis of small and light structures is presented. The method is non-contact, therefore there is no added mass of the sensors to the structure. The structure is acoustically excited with a pure sine signal that is tuned to each resonant frequency. A single response measurement with the Laser Doppler Vibrometer in individual points is needed to determine the modal parameters. A mass-change strategy is used for the mass-normalisation of the measured mode shapes. The main contribution of the presented method compared to other similar methods is that the mode shapes are better accentuated (due to sine excitation), which can improve the results of the modal analysis on small and light structures, where the response of the structure is weak. The method is also easy to perform, because only a single response measurement is needed for each point and the excitation force does not need to be measured. The presented method gives accurate results, which was confirmed with the comparison of the experimental and the numerical results on a sample of simple geometry. %U https://www.sv-jme.eu/article/tuned-sinusoidal-method-for-operational-modal-analysis-of-small-and-light-structures/ %0 Journal Article %R 10.5545/sv-jme.2013.1371 %& 187 %P 8 %J Strojniški vestnik - Journal of Mechanical Engineering %V 60 %N 3 %@ 0039-2480 %8 2018-06-28 %7 2018-06-28
Rovšček, Domen, Janko Slavič, & Miha Boltežar. "Tuned-sinusoidal method for operational modal analysis of small and light structures." Strojniški vestnik - Journal of Mechanical Engineering [Online], 60.3 (2014): 187-194. Web. 20 Dec. 2024
TY - JOUR AU - Rovšček, Domen AU - Slavič, Janko AU - Boltežar, Miha PY - 2014 TI - Tuned-sinusoidal method for operational modal analysis of small and light structures JF - Strojniški vestnik - Journal of Mechanical Engineering DO - 10.5545/sv-jme.2013.1371 KW - operational modal analysis; tuned-sinusoidal method; mode shape normalisation; small and light structures; single response; acoustic excitation N2 - Small and light structures have some distinctive features that intensify the difficulties of measuring their modal parameters. The mass that is added to the structure by the sensors cannot be neglected and the resonant frequencies are usually relatively high, therefore a wide frequency range of measurement is needed. There are also difficulties with assuring the proper excitation, so that all the measured modes are excited well and that at the same time the excitation level is not too large, which would cause larger response of the structure than the measuring ranges of the sensors can cover. In this study an innovative method for operational modal analysis of small and light structures is presented. The method is non-contact, therefore there is no added mass of the sensors to the structure. The structure is acoustically excited with a pure sine signal that is tuned to each resonant frequency. A single response measurement with the Laser Doppler Vibrometer in individual points is needed to determine the modal parameters. A mass-change strategy is used for the mass-normalisation of the measured mode shapes. The main contribution of the presented method compared to other similar methods is that the mode shapes are better accentuated (due to sine excitation), which can improve the results of the modal analysis on small and light structures, where the response of the structure is weak. The method is also easy to perform, because only a single response measurement is needed for each point and the excitation force does not need to be measured. The presented method gives accurate results, which was confirmed with the comparison of the experimental and the numerical results on a sample of simple geometry. UR - https://www.sv-jme.eu/article/tuned-sinusoidal-method-for-operational-modal-analysis-of-small-and-light-structures/
@article{{sv-jme}{sv-jme.2013.1371},
author = {Rovšček, D., Slavič, J., Boltežar, M.},
title = {Tuned-sinusoidal method for operational modal analysis of small and light structures},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {60},
number = {3},
year = {2014},
doi = {10.5545/sv-jme.2013.1371},
url = {https://www.sv-jme.eu/article/tuned-sinusoidal-method-for-operational-modal-analysis-of-small-and-light-structures/}
}
TY - JOUR AU - Rovšček, Domen AU - Slavič, Janko AU - Boltežar, Miha PY - 2018/06/28 TI - Tuned-sinusoidal method for operational modal analysis of small and light structures JF - Strojniški vestnik - Journal of Mechanical Engineering; Vol 60, No 3 (2014): Strojniški vestnik - Journal of Mechanical Engineering DO - 10.5545/sv-jme.2013.1371 KW - operational modal analysis, tuned-sinusoidal method, mode shape normalisation, small and light structures, single response, acoustic excitation N2 - Small and light structures have some distinctive features that intensify the difficulties of measuring their modal parameters. The mass that is added to the structure by the sensors cannot be neglected and the resonant frequencies are usually relatively high, therefore a wide frequency range of measurement is needed. There are also difficulties with assuring the proper excitation, so that all the measured modes are excited well and that at the same time the excitation level is not too large, which would cause larger response of the structure than the measuring ranges of the sensors can cover. In this study an innovative method for operational modal analysis of small and light structures is presented. The method is non-contact, therefore there is no added mass of the sensors to the structure. The structure is acoustically excited with a pure sine signal that is tuned to each resonant frequency. A single response measurement with the Laser Doppler Vibrometer in individual points is needed to determine the modal parameters. A mass-change strategy is used for the mass-normalisation of the measured mode shapes. The main contribution of the presented method compared to other similar methods is that the mode shapes are better accentuated (due to sine excitation), which can improve the results of the modal analysis on small and light structures, where the response of the structure is weak. The method is also easy to perform, because only a single response measurement is needed for each point and the excitation force does not need to be measured. The presented method gives accurate results, which was confirmed with the comparison of the experimental and the numerical results on a sample of simple geometry. UR - https://www.sv-jme.eu/article/tuned-sinusoidal-method-for-operational-modal-analysis-of-small-and-light-structures/
Rovšček, Domen, Slavič, Janko, AND Boltežar, Miha. "Tuned-sinusoidal method for operational modal analysis of small and light structures" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 60 Number 3 (28 June 2018)
Strojniški vestnik - Journal of Mechanical Engineering 60(2014)3, 187-194
© The Authors, CC-BY 4.0 Int. Change in copyright policy from 2022, Jan 1st.
Small and light structures have some distinctive features that intensify the difficulties of measuring their modal parameters. The mass that is added to the structure by the sensors cannot be neglected and the resonant frequencies are usually relatively high, therefore a wide frequency range of measurement is needed. There are also difficulties with assuring the proper excitation, so that all the measured modes are excited well and that at the same time the excitation level is not too large, which would cause larger response of the structure than the measuring ranges of the sensors can cover. In this study an innovative method for operational modal analysis of small and light structures is presented. The method is non-contact, therefore there is no added mass of the sensors to the structure. The structure is acoustically excited with a pure sine signal that is tuned to each resonant frequency. A single response measurement with the Laser Doppler Vibrometer in individual points is needed to determine the modal parameters. A mass-change strategy is used for the mass-normalisation of the measured mode shapes. The main contribution of the presented method compared to other similar methods is that the mode shapes are better accentuated (due to sine excitation), which can improve the results of the modal analysis on small and light structures, where the response of the structure is weak. The method is also easy to perform, because only a single response measurement is needed for each point and the excitation force does not need to be measured. The presented method gives accurate results, which was confirmed with the comparison of the experimental and the numerical results on a sample of simple geometry.