Large-amplitude vibrations of geometrically imperfect shallow spherical shells with structural damping

AIAA Journal ◽  
1983 ◽  
Vol 21 (12) ◽  
pp. 1736-1741 ◽  
Author(s):  
David Hui
Keyword(s):  
Large Amplitude ◽  
Structural Damping ◽  
Spherical Shells ◽  
Large Amplitude Vibrations

Effects of Geometric Imperfections on Large-Amplitude Vibrations of Rectangular Plates With Hysteresis Damping

1984 ◽  
Vol 51 (1) ◽  
pp. 216-220 ◽  
Author(s):  
David Hui
Keyword(s):  
Large Amplitude ◽  
Plate Thickness ◽  
Rectangular Plates ◽  
Structural Damping ◽  
Geometric Imperfections ◽  
Geometric Imperfection ◽  
Forcing Function ◽  
Initial Geometric Imperfections ◽  
Spatial Shape ◽  
Large Amplitude Vibrations

The present paper deals with the effects of initial geometric imperfections on large-amplitude vibrations of simply supported rectangular plates. The vibration mode, the geometric imperfection, and the forcing function are taken to be of the same spatial shape. It is found that geometric imperfections of the order of a fraction of the plate thickness may significantly raise the free linear vibration frequencies. Furthermore, contrary to the commonly accepted theory that large-amplitude vibrations of plates are of the hardening type, the presence of small geometric imperfections may cause the plate to exhibit a soft-spring behavior. The effects of hysteresis (structural) damping on the vibration amplitude are also examined.

A nonlinear model of thick shells for large-amplitude vibrations

2021 ◽  
Vol 130 ◽  
pp. 103668
Author(s):  
Hamid Reza Moghaddasi ◽  
Mojtaba Azhari ◽  
Mohammad Mehdi Saadatpour ◽  
Saeid Sarrami-Foroushani
Keyword(s):  
Nonlinear Model ◽  
Large Amplitude ◽  
Large Amplitude Vibrations ◽  
Thick Shells

On the energy extraction from large amplitude vibrations of MEMS-based piezoelectric harvesters

2017 ◽  
Vol 228 (10) ◽  
pp. 3445-3468 ◽  
Author(s):  
Abdolreza Pasharavesh ◽  
M. T. Ahmadian ◽  
H. Zohoor
Keyword(s):  
Large Amplitude ◽  
Energy Extraction ◽  
Large Amplitude Vibrations

Retrofit of Aerodynamic Cable Instability on a Cable-Stayed Bridge: Case Study

2000 ◽  
Vol 1740 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Niket M. Telang ◽  
Charles M. Minervino ◽  
Paul G. Norton
Keyword(s):  
Large Amplitude ◽  
Weather Conditions ◽  
Mitigation Measures ◽  
Mobile Bay ◽  
Department Of Transportation ◽  
Light Rain ◽  
Wind Speeds ◽  
Cable Stays ◽  
Large Amplitude Vibrations

Elegantly poised over the Mobile River, the twin pylons and the semi-harped cable stays of the Cochrane Bridge subtly complement the vast and undulating landscape of the Mobile Bay as the bridge carries US Route 90 over the Mobile River in Alabama. In February 1998, light rain drizzled on the bridge, and a weather station nearby recorded wind speeds of about 48 km/h (30 mph). Under these seemingly mild weather conditions, the normally immobile cable stays started to vibrate, and within moments, these nascent vibrations reached amplitudes of more than 1.2 m (4 ft). Alarmed by this event, the Alabama Department of Transportation (ALDOT) took immediate action to ensure the continued safety and serviceability of the bridge. A team of consultants was selected by ALDOT to investigate mitigation measures for the large-amplitude cable-stay vibrations. The fast-tracked comprehensive program planned and implemented to inspect, test, document, and evaluate the effects of the large-amplitude vibrations and the recommendation of retrofit measures that would limit future occurrences of such cable-stay vibrations on the Cochrane Bridge are described in detail.

Vector representation of large-amplitude vibrations for the determination of kinetic energy functions

1982 ◽  
Vol 91 (2) ◽  
pp. 286-299 ◽  
Author(s):  
J. Laane ◽  
M.A. Harthcock ◽  
P.M. Killough ◽  
L.E. Bauman ◽  
J.M. Cooke
Keyword(s):  
Kinetic Energy ◽  
Large Amplitude ◽  
Vector Representation ◽  
Energy Functions ◽  
Large Amplitude Vibrations
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