Parametric method applicable in assessing breakout force and time for lifting slender bodies from seabed

• Autorzy: Michalski Jan P.

Identyfikatory

DOI

10.2478/pomr-2020-0028

• Języki publikacji: EN

Abstrakty

EN

The article presents a parametric method applicable in assessing the suction force of a slender body to the seabed, and prognosing the body extrication time. Along with the body weight in water, the information on the suction force is essential for assessing the force needed to lift the object from the seabed. Based on the Foda theory and the resulting integral equation, which relates the maximum suction force with basic parameters of the issue of concern, the parametric method has been developed which can be widely applied in engineering practice of lifting objects. A set of discrete values of parameters selected from the range of typical values for engineering practice was the basis for developing algebraic formulas approximating the integral Foda equation for slender bodies. The included results of tests present the variability of suction force characteristics and the envelopes of maximum forces needed to extricate the body from the seabed.

Słowa kluczowe

EN

lifting objects from the seabed; breakout force; force needed to extricate the object from the seabed

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2020
• Tom: nr 2
• Strony: 69--75
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Michalski Jan P.

• Gdańsk University of Technology Narutowicza 11/12, 80-233 Gdańsk, Poland

Bibliografia

• 1. Basinski T.: Resistance force during extricating a rigid body from sandy bottom of water reservoir (in Polish). Archiwum Hydrotechniki. Vol. XVI, No. 4, 1969.
• 2. Basinski T.: Laboratory tests of resistance force during extricating a large rigid body from the bottom of natural water reservoir (in Polish). Rozprawy Hydrotechniczne. No.23, Instytut Budownictwa Wodnego PAN, 1969.
• 3. Foda M.A.: On the extrication of large objects from the ocean bottom (the breakout phenomenon). Journal of Fluid Mechanics. Vol 117, 1982.
• 4. Liu C.L.: Ocean sediment holding strength against breakout of imbedded objects. Tech. Rep. US Naval Civil Engineering Laboratory, Port Hueneme, California, 19669.
• 5. Mei C.C., Yeung R.W., Liu K.F.: Lifting of a large object from a porous seabed. Journal of Fluid Mechanics. Vol 152, 1985.
• 6. Michalski J.P.: Design method and study of autonomous hydro-location module for measuring and examining physical phenomena in marine environment (in Polish). Prace Naukowo-Badawcze WOiO, No. 01/PR/2010, Gdansk University of Technology.
• 7. Poinc W.: Maritime Rescue (in Polish). Wydawnictwo Morskie. Gdynia 1966.
• 8. Robakiewicz M.: Breakout force needed to extricate a rigid body from the bottom of a natural water reservoir (in Polish). Inżynieria Morska. Nr 4/1985.
• 9. Sawicki A.: Soil suction forces and the breakout phenomenon. Studia Geotechnica et Mechanica. Vol. XVII, no 1-2, 1995.
• 10. Michalski J.P.: Parametric method applicable in calculating breakout force and time for lifting axisymmetric objects from seabed. Polish Maritime Research Nr 3 (103) 2019.
• 11. Sawicki A. et. al.: New Type of Bottom Protection in Harbors – Design Method. Journal of Waterway, Port, Coastal and Ocean Engineering. July/August, 1998.
• 12. Sawicki A., Mierczyński J.: Mechanics of the breakout phenomenon. Computers and Geotechnics 30. 2003.
• 13. Sawicki A.: Outline of mechanics of granular soils (in Polish). Wydawnictwo IBW PAN. Gdansk 2012.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).