626-632

Strength, rigidity and buoyancy analysis for pontoons in vertical cylindrical tanks

Mikhail G. Karavaichenko ^a, Alexander V. Vasiliev ^b, Rustam I. Galimzyanov ^b

^a Ufa State Petroleum Technological University (USPTU), 1 Kosmonavtov Str., Ufa, 450062, Russian Federation

^b Neftemontazhdiagnostika, CJSC, 13à Ufimskoe Shosse, Ufa, 450104, Russian Federation

DOI: 10.28999/2541-9595-2019-9-6-626-632

Abstract: A model for finite element calculations of a full-contact pontoon for rigidity and strength is proposed. The boundary conditions, design performances of materials and loads (as per GOST 31385-2016) applied in the construction of the finite element model of the pontoon are indicated. The results of calculations for the strength, deformation and buoyancy of full-contact pontoons Pb-40-0.6; Pb-60-0.6; Pb-60-1.2 are presented. It is established that Pb-40-0.6 pontoons have sufficient strength, but are not able to carry a combination of loads from their dead weight and 0.24 kPa; Pb-60-0.6 pontoons have sufficient strength, buoyancy and allowed movements under loads regulated by GOST 31385-2016; Pb-60-1.2 pontoons meet the regulatory requirements for strength, rigidity and buoyancy, however, increased – up to 1.2 mm – thickness of floor boarding leads to an increase in the weight and cost of the pontoon, while not solving the problem of corrosion. It is proposed to use the clad alloy AMg2AM or an electrically conductive polymer composite material with a service temperature of –60 ... +120 °C, resistant to hydrocarbon media, as a corrosion-resistant material for pontoon floor boarding.

Keywords: vertical steel tank, pontoon, finite element method, pontoon strength calculation, pontoon rigidity calculation, pontoon buoyancy calculation.

For citation:
Karavaichenko M. G., Vasiliev À. V., Galimzyanov R. I. Strength, rigidity and buoyancy analysis for pontoons in vertical cylindrical tanks. Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktov–Science & Technologies: Oil and Oil Products Pipeline Transportation. 2019;9(6):626–632.

References:
[1] Karavaichenko M. G., Fatkhiev N. M. Comparison of floating and full-contact pontoons efficiency in the tank. Environmental protection in the oil and gas industry. 2012(5):18–21. (In Russ.)
[2] Mustafin F. M., Zhdanov R. À., Karavaychenko Ì. G., et al. Oil and oil product storage tanks. Volume 1: Design and Equipment: textbook for higher education. Saint Petersburg: Nedra Publ.; 2010. 480 p. (In Russ.)
[3] Gadelshin R. Z., Lukyanova I. E. Reliability improvement of floating tank coating. Ufa: Ufa State Petroleum Technological University Publ.; 1999. 239 p. (In Russ.)
[4] Yakshibaev I. N., Lukyanova I. E., Zaripov M. Z. Investigation of stress-strain state of aluminum coverings based on physical modeling. Transport and Storage of Oil Products and Hydrocarbons. 2015(3):17–24. (In Russ.)
[5] Yakshibaev I. N. Comparison of strength characteristics of aluminum alloys coverings of different supporting structures for vertical steel tanks. Transport and Storage of Oil Products and Hydrocarbons. 2014(3):19–24. (In Russ.)
[6] RyabininV. P., Lukyanova I. Å., Mustafin F. Ì. Possibilities of service reliability enhancement of vertical steel cylindrical tanks with coverings. Oil and Gas Business. 2007;5(1):133–140. (In Russ.)
[7] Karavaychenko M. G., Babin L. À., Usmanov R. Ì. Floating roof storage tanks. Moscow: Nedra Publ.; 1992. 236 p. (In Russ.)
[8] Kravtsov V. V., Tambova Î. V., Fathiev N. Ì., Karavaychenko M. G. Aluminum structures in storage tank engineering. Study guide. Ufa: Ufa State Petroleum Technological University Publ.; 2007. 143 p. (In Russ.)