Collision modeling of single unit impact absorber for mechanical systems vibration attenuation

• Autorzy: Chehaibi Kaouther , Mrad Charfeddine , Nasri Rachid

Identyfikatory

DOI

10.15632/jtam-pl/112417

• Języki publikacji: EN

Abstrakty

EN

A single unit impact absorber is a ball absorber located in a mechanical system to attenuate its undesirable vibration. The absorber has a free motion constrained by stops. Collisions between the main system and the absorber masses help to dissipate kinetic energy as heat, noise and high frequency vibrations and thus reducing the main system dynamic response. However, the collisions give rise to discontinuity and strong nonlinearity. This work intends to study the effect of the collision modeling on the absorber efficiency. The contact force-based linear viscoelastic model of Hook-Newton, nonlinear elastic model of Hertz, and nonlinear viscoelastic model proposed by Hunt and Crossley are considered. For each case, analytical study is conducted to determine the equations of motion. The system responses are obtained for forced vibration, considering the whole ball motion cycle: left impact-free motion-right impact and following a numerical resolution based on the Newmark method. Finally, comparison of different impact models is made to conclude on the single unit impact absorber performance.

Słowa kluczowe

EN

mechanical system; single unit impact absorber; collision modeling

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2019
• Tom: Vol. 57 nr 4
• Strony: 947--956
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Chehaibi Kaouther

• Laboratory of Applied Mechanics and Engineering (LMAI), National Engineering School of Tunis (ENIT), University of Tunis el Manar (UTM), Tunis, Tunisia

autor

Mrad Charfeddine

• Laboratory of Applied Mechanics and Engineering (LMAI), National Engineering School of Tunis (ENIT), University of Tunis el Manar (UTM), Tunis, Tunisia

autor

Nasri Rachid

• Laboratory of Applied Mechanics and Engineering (LMAI), National Engineering School of Tunis (ENIT), University of Tunis el Manar (UTM), Tunis, Tunisia

Bibliografia

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• 3. Anagnostopoulos S.A., 2004, Equivalent viscous damping for modeling inelastic impacts in earthquake pounding problems, Earthquake Engineering and Structural Dynamics, 33, 897-902
• 4. Bapat C.N., Sankar S., 1985, Single unit impact damper in free and forced vibration, Journal of Sound and Vibration, 99, 85-94
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• 11. Grubin C., 1956, On the theory of the acceleration damper, Journal of Applied Mechanics, 23, 373-378
• 12. Hunt K.H., Crossley F.R.E., 1975, Coefficient of restitution interpreted as damping in vibroimpact, Journal of Applied Mechanics, 42, 440-445
• 13. Lieber P., Jensen D.P., 1945, An acceleration damper: development, design, and some applications, Transactions of ASME, 67, 523-530
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).