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The analysis of effective energy of ship's berthing to the quay

Galor W.

Journal of KONES

2012

Vol. 19, No. 4

185-191

The berthing of ship to the quay is last stage of navigation process. An ideal manoeuvre would be consisted in a total loss of speed at the moment the ship makes contact with the quay. In practice, the ship has some speed, which caused the impact of ship in the quay. The accident can be happened when kinetic energy overdone the admissible value during contact the ship-quay. In results, the damage of ship's hull or port structure can occur. The fenders improve the safety of berthing operations by partially absorbing the kinetic energy of ship. The fenders parameters should be properly selected relative to existing condition during ship's berthing. It depends on effective energy of berthing ship. There are used some method to calculate of its value. One of them is based on phenomena of ship turning relative to point of first contact to the quay. Then the part of ship's kinetic energy is altered to work of turn, and in result, energy of ship impact is decreased. This part can be determined by coefficient of eccentricy. Its value mainly depends on radius of ship's turning, which is equal of distance between point of ship, gravity and point of first contact with quay. Simplified method of calculation the eccentricy coefficient based on ships angle of approaching to the quay. But such estimated value is weighted some discrepancy. The paper presents the analysis of methods of calculation the kinetic energy during first impact in the quay. Especially, the geometrical shape of ship's hull is considered to achieve the accuracy value of ship's impact energy during the berthing to the quay. The application of elaborated method permits to optimize the parameters of fender system.

The safety of ship during berthing manoeuvre process to the quay

Galor W.

Journal of KONBiN

2008

No. 4 (7)

5-18

The berthing of ship to the quay is last stage of navigation advance. An ideal manoeuvre would be consisted in a total loss of speed at the moment the ship makes contact with the quay. The accident can happened as results of unwanted ship's strike to the quay. In results, the damage of ship's hull or port structure can occur. It can happened when will be exceeding the admissible energy during contact the ship-quay. The fenders improve the safety of berthing operations by partially absorbing the kinetic energy of ship. The paper presents the analysis of risk of accident when ship berthing. Besides, the possibility of its decreasing by use of fenders will be considered.

Manewr cumowania statku do nabrzeża jest ostatnim etapem procesu nawigacji. Manewr idealny polega na całkowitym wytraceniu prędkości statku w momencie kontaktu z nabrzeżem. Lecz należy się liczyć z tym, że może zdarzyć się wypadek jako niepożądane uderzenie statku w nabrzeże. Może to wystąpić, gdy zostanie przekroczona dopuszczalna energia podczas kontaktu statek- nabrzeże. W rezultacie, może wystąpić uszkodzenie kadłuba statku lub budowli portowej. Urządzenia odbojowe poprawiają bezpieczeństwo cumowania poprzez częściowa absorpcję energii kinetycznej statku. Referat przedstawia analizę ryzyka wypadku podczas cumowania statku. Ponadto przedstawiono rozważania jego zmniejszenia poprzez zastosowanie urządzeń odbojowych.