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S21 Vibrações e Análise Modal |
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Title:
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NUMERICAL AND EXPERIMENTAL ANALYSIS OF A PASSIVE ABSORPTION SYSTEM WITH COULOMB DAMPING
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Summary :
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SUMMARY. THE OBJECTIVE OF THIS WORK IS TO UNDERSTAND THE BEHAVIOR (RESPONSE) OF A STRUCTURE CONTAINING AN ABSORPTION SYSTEM WITH COULOMB DAMPING AND MODELED WITH TWO DEGREES OF FREEDOM. IN ORDER TO ACHIEVE THIS GOAL, A THEORETICAL-COMPUTATIONAL MODEL WAS DEVELOPED AND ADJUSTED TO EXPERIMENTAL RESULTS.
THE EXPERIMENTAL MODEL IS A CANTILEVER BEAM WITH THE ABSORPTION SYSTEM PLACED ON IT. THE ABSORPTION SYSTEM IS A SPRING-MASS SYSTEM WITH A FRICTION ELEMENT ACTING ON ITS AXIS WHICH IS ATTACHED TO THE BEAM. THE DYNAMIC FORCES USED IN THE EXPERIMENTS ARE: IMPACTS, PEOPLE JUMPING AND HARMONIC EXCITATION.
A PARAMETRIC STUDY WAS PERFORMED AFTER THE THEORETICAL-COMPUTATIONAL MODEL HAD BEEN ADJUSTED. THE RESULTS INDICATE THAT THE SYSTEM IS ONLY APPLICABLE TO SOME SITUATIONS, AND CARE SHOULD BE TAKEN IN THE DESIGN CONCEPT. THAT IS LINKED TO THE NON-LINEAR BEHAVIOR OF THE RESPONSE WITH THIS KIND OF DAMPING.
KEYWORDS: PASSIVE ABSORPTION SYSTEM, COULOMB DAMPING, COMPUTATIONAL AND EXPERIMENTAL ANALYSIS.
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Author :
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Louroza, Marcus Aurellius
Magluta, Carlos 0
Roitman, Ney 0
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Paper View :
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