Identification of Nonlinear Damping for Large-Amplitude Vibrations of Plates and Curved Panels
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Дата
2016
Автори
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
NTU "KhPI"
Анотація
A nonlinear identification technique is presented to obtain the damping of isotropic and laminated sandwich
rectangular plates and curved panels subjected to harmonic excitation as a function of the vibration amplitude. The
response of the structures is approximated by (i) reduced-order models with 10 to 100 degrees of freedom and (ii) a
single-degree of freedom Duffing oscillator. The method uses experimental frequency-amplitude data and the leastsquares
technique to identify parameters and reconstruct frequency-response curves by spanning the excitation
frequency in the neighbourhood of the lowest natural frequencies. In order to obtain the experimental data, a
sophisticated measuring technique has been used. The results reveal a strongly nonlinear correlation between the
damping and the vibration amplitude.
Опис
Ключові слова
nonlinear vibrations, damping, experiments
Бібліографічний опис
Amabili M. Identification of Nonlinear Damping for Large-Amplitude Vibrations of Plates and Curved Panels / M. Amabili // Nonlinear Dynamics–2016 (ND-KhPI2016) : proceedings of 5th International Conference, dedicated to the 90th anniversary of Academician V. L. Rvachev, September 27-30, 2016 = Нелінійна динаміка–2016 : тези доп. 5-ї Міжнар. конф., 27-30 вересня 2016 р. – Kharkov : NTU "KhPI", 2016. – P. 12-15.