Open Access Open Access  Restricted Access Subscription or Fee Access

Analysis of Fixed Offshore Platform Deck using Acceleration - Deflection Resonance Method

Temple Nwofor, I. Etafo

Abstract


Steel plate is commonly used as the flooring plate for fixed offshore platform Deck and there are several existing methods for analyzing the steel plate. In this research acceleration-displacement resonance method is developed for analyzing plate. The plate is first analyzed considering arbitrary uniformly distributed and point load with an all-round simply support. The method involves transformation of bi-harmonic equation into acceleration- deflection ratio ( R_xx). From the study, the maximum deflection and maximum bending moment of simply supported plate of the deck subjected to uniform load were obtained to be 0.0040629 (qa^4)/D and 0.0483qa^2 . Considering Simply supported plate of the deck subjected to point load, the maximum deflection obtained was 0.00114 (Pa^2)/D , maximum moment given as 0.4628P and twisting moment obtained as zero. The study has shown that, the solutions of this method are exact and the method can be readily applied on plate problems involving offshore platform, aerospace, building, naval structures and roads.

Full Text:

PDF

References


Johnarry, T.N (2011). Acceleration-Displacement Ratio Transform of Differentials for Transverse Plates and Constant Stiffness Buckling Solution. ISSN 2222-1727 (Paper) ISSN 2222-2871 Vol 2, No 4, 2011

Timoshenko, S.P., and Woinowsky-Krieger, S., (2011). Theory of plate and shells. McGraw-Hill, Kogakusha Ltd, international Edition.

API (American Petroleum Institute). (Dec. 2000). “Recommended practice for planning, designing and constructing fixed offshore platforms”, API-RP2A, 21st Edition,Washington, DC.

Subrata, K.C. (2005). Handbook of Offshore Engineering, Plainfield, Illinois, USA. Volume I

Eduard, V.T. (2005). Thin Plates and Shells Theory, Analysis, and Applications, Marcel Dekker, Inc, the Pennsylvania State University.

Havard, H. (2002, February 02). Plates - solution methods. Retrieved from http://www.illustrations.marin.ntnu.no/structures/components/plates/first_order/solution/levy/index.html.

Johns, D.J., Thermal Stress Analysis, Pergamon Press, Elmsford, New York, 1965.

Lekhnitskii, S.G., Anisotropic Plates, Gordon and Breach, New York, 1968.

Vasil’ev, V.V., Classical theory of plates: historical perspective and state-of-the-art, Mechanics of Solids, vol. 33, No. 3, pp. 35–45 (1998).

Zihlin, P.A., On Poisson’s and Kirchhoff’s theories of plates from the

point of view of the modern theory of plates, Mechanics of Solids, No. 3, pp. 65–72 (1992).

Offshore Oil and Gas Production Systems.




DOI: https://doi.org/10.37628/jsmfe.v4i1.551

Refbacks

  • There are currently no refbacks.