TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
The Influence of Time Application of a Force by Shock on the Dynamic Response of a Mechanical Structure
(Influenţa timpului de aplicare a unei sarcini prin şoc asupra răspunsului dinamic al unei structuri)
Vol LXVII • No. 3/2015
Ioan Popa, Lavinia Silvia Stanciu
Universitatea Petrol – Gaze din Ploieşti, Bd. Bucureşti 39, 100680, Ploieşti
e-mail: ipopa@upg-ploiesti.ro

 Keywords   mechanical shocks, response spectrum, suddenly applied force, a pillar-mounted slewing jib

 Abstract
Mechanical shocks are complex dynamic phenomena which can appear during the functioning of a structure or equipment. They can be encountered in normal operation (case of forges or automatic pile drivers) or they can be accidentally produced. In the much known cases of shock, a body with a certain mass strikes another body or a structure. Likewise, shocks can be encountered when a force is suddenly applied on a structure or when bodies with known masses (motors) are suddenly turned on or off. The aim of this paper is to determine the dynamic response of a structure due to a mechanical shock produced by a suddenly applied force. The influence of time variation of a force on the dynamic response (shock response spectrum for displacements) of a given structure like a pillar-mounted slewing jib will be analyzed.

 Rezumat
Şocurile mecanice sunt fenomene dinamice complexe care apar în timpul funcţionării unor instalaţii sau structuri. Ele pot corespunde unor situaţii normale de funcţionare (cazul forjelor, al sonetelor de bătut piloni) sau se pot produce accidental. În cazurile clasice de şoc mecanic, un corp de o anumită masă loveşte un alt corp sau o structură. Tot şocuri sunt şi cazurile în care o forţă se aplică brusc asupra unei structuri sau în cazul opririlor sau pornirilor bruşte ale unor corpuri de tipul motoarelor. În lucrarea de faţă se va determina răspunsul dinamic al unei structuri la un şoc mecanic produs de aplicarea bruscă a unei forţe. Se va analiza influenţa timpului de variaţie a forţei care se aplică prin şoc asupra răspunsului dinamic (spectrul de răspuns în deplasări) al unei structuri de tipul macara pivotantă.



Journal INFO (ISSN 1224-8495)
Vol LXVIII • No. 3/2016
Vol LXVIII • No. 2/2016
Vol LXVIII • No. 1/2016
Vol LXVII • No. 4/2015
Vol LXVII • No. 3/2015
Vol LXVII • No. 2/2015
Vol LXVII • No. 1/2015
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Vol LXII • No. 2/2010 (Special Issue WELDING 2010)
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