TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Aspects of the Non-linear Buckling Analysis of the MU200 Mast
(Aspecte privind flambajul mastului MU200 în domeniul neliniar)
Vol LVIII • No. 2/2006
Gheorghe Gherghe*, Nicolae Posea**
* SC Timken SA, Str Dr. Gh. Petrescu 25, Ploieşti
e-mail: george.gherghe@timken.com
** Universitatea PetrolGaze din Ploieşti, Bd. Bucureşti 39, Ploieşti
e-mail: nposea@upg-ploiesti.ro

 Keywords   non-linear buckling, instability zone, arc-length method, post-buckling analysis.

 Abstract
This article presents the most important aspects of the post-buckling analysis of the MU200 mast, such as the critical load at which the bifurcation point of the equilibrium appears, the critical load at which the limitation point of the equilibrium appears and the post-buckling behaviour of the MU200 mast. After the presentation of the theoretical aspects and the principal iterative methods used in the non-linear buckling analysis, the post-buckling behaviour of the MU200 mast is analysed. At the end a new method for the study of the buckling of masts is presented.

 Rezumat
In cadrul acestui articol sunt prezentate cele mai importante aspecte ale comportării post-flambaj a mastului MU200, cum ar fi: sarcina critică de pierdere a stabilităţii prin bifurcarea echilibrului, sarcina critică de pierdere a stabilităţii prin limitarea echilibrului şi răspunsul post-flambaj al mastului MU200.
După prezentarea principalelor aspecte teoretice şi a principalelor metode iterative de rezolvare a ecuaţiilor de mişcare utilizate în studiul flambajului în domeniul neliniar, este studiată comportarea post-flambaj a mastului MU200. La sfârşitul acestui articol este propusă o nouă metodă care permite studiul complet al flambajului (flambajul în domeniul liniar şi flambajul în domeniul neliniar) masturilor de foraj.



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