TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
The Study of the Dynamic Stability Curves
(Studiul curbelor de stabilitate dinamică ale mastului MU200)
Vol LVIII • No. 2/2006
Nicolae Posea*, Gheorghe Gherghe **
* Universitatea Petrol Gaze din Ploieşti, Bd. Bucuresti 39, Ploieşti
e-mail: nposea@upg-ploiesti.ro
** SC Timken Romania SA, Str Sr. Gh. Petrescu 25, Ploieşti
e-mail: george.gherghe@timken.com

 Keywords   dynamic stability, dynamic stability curves, instability zone, stability chart.

 Abstract
This article presents the most important aspects of the dynamic stability curves of the MU200 mast. These dynamic stability curves represent a great instrument which is used in order to determine the area in which the MU200 mast can operate in safe conditions. After the presentation of the theoretical aspects, the stability chart of the MU200 mast is analysed. Also, a new method for the study of the stability chart of MU200 mast is presented. The way this study is conducted can easily be applied to every mast used in the petroleum industry.

 Rezumat
In cadrul acestui articol sunt prezentate cele mai importante aspecte ale studiului curbelor de stabilitate dinamică ale mastului MU200. Pe baza acestor zone de stabilitate dinamică sunt stabilite condiţiile în care mastul MU200 poate să funcţioneze în condiţii de siguranţă. Ţinând cont de importanţa acestor zone de stabilitate, se propune un algoritm care permite obţinerea curbelor de stabilitate dinamică pentru mastul MU200, algoritm uşor de implementat în practică. Acest mod de analiză prezentat poate fi cu uşurinţă extins la toate masturile de foraj din industria petrolieră.



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