Vertical motions damping model test of a lifeboat lowered onto a flat sea surface

• Autorzy: Kniat A. , Dymarski P.

Identyfikatory

DOI

10.2478/pomr-2018-0022

• Języki publikacji: EN

Abstrakty

EN

The article presents the experiment’s results of the lifeboat model lowered with an initial speed and then released to fall onto a flat water surface. The purpose of the research is to determine the trajectory of the vertical boat motion and describe it with a mathematical model. This is closely related to determining the damping factor since the vertical motion is damped and the lifeboat gets balanced and stops moving after some time. The procedure of selecting parameters in the mathematical model to adjust to the results of the experiment was described in details. The summary describes the imperfections of the presented damping model and their probable causes.

Słowa kluczowe

EN

damping; dynamics; differential equations; lowering a lifeboat; numerical simulations

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2018
• Tom: S 1
• Strony: 51--55
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Kniat A.

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

autor

Dymarski P.

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

Bibliografia

• 1. Chakrabarti S., EMPIRICAL CALCULATION OF ROLL DAMPING FOR SHIPS AND BARGES, Ocean Engineering, Volume 28, Issue 7, pp. 915-932, 2001.
• 2. Chen J.P., Zhu D.X, NUMERICAL SIMULATIONS OF WAVE-INDUCED SHIP MOTIONS IN TIME DOMAIN BY A RANKINE PANEL METHOD, Journal of Hydrodynamics, Ser. B, Volume 22, Issue 3, pp. 373-380, 2010.
• 3. Dudziak J., TEORIA OKRĘTU. Wydawnictwo Morskie, Gdańsk 1988.
• 4. Dymarski P. Dymarski Cz., COMPUTATIONAL MODEL FOR SIMULATION OF LIFEBOAT MOTIONS DURING ITS LAUNCHING FROM SHIP IN ROUGH SEAS, Polish Maritime Research Vol. 19 No. 3(75), 2012.
• 5. Dymarski C., Dymarski P., Kniat A., SEARCHING FOR CRITICAL CONDITIONS DURING LIFEBOAT LAUNCHING – SIMULATIONS, Polish Maritime Research, Vol. 24 Special Issue 2017 S1 (93), 53-58, DOI: 10.1515/pomr-2017-0021, 2017.
• 6. Hibbeler R.C., Engeineering Mechanics: Dynamics, Pearson Prentice-Hall, 2016.
• 7. Kring D., TIME DOMAIN SHIP MOTIONS BY A THREEDIMENSIONAL RANKINE PANEL METHOD, PhD thesis, MIT, 1994.
• 8. POZAKLASYFIKACYJNE PRZEPISY WYPOSAŻENIA STATKÓW MORSKICH, Polski Rejestr Statków, Gdańsk 1990.
• 9. SciLab, https://www.scilab.org.
• 10. Timman R. Newman J., THE COUPLED DAMPING COEFFICIENTS OF A SYMMETRIC SHIP, Journal of Ship Research, Vol. 5, No. 4, 1962.
• 11. Wassermann S., Feder D.F., Abdel-Maksoud M., ESTIMATION OF SHIP ROLL DAMPING – A COMPARISON OF THE DECAY AND THE HARMONIC EXCITED ROLL MOTION TECHNIQUE FOR A POST PANAMAX CONTAINER SHIP, Ocean Engineering, Volume 120, pp. 371-382, 2016.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).