Analysis of Allowable Berthing Velocity by Ship Size considering Designed Energy

Abstract

The berthing velocity is the factor that has the greatest influence on the berthing energy. For the vessel to berth safely, it should not exceed the appropriate berthing velocity. In addition, when the vessel is berthing, it should be berthed with berthing energy smaller than the energy absorption of the fender. This study intends to derive the allowable berthing velocity by ship size considering the berthing capacity. When a small vessel berth, the allowable berthing velocity is greater than when a relatively large vessel berths. In this study, the extrapolated velocity is defined as the relative value of the ship’s berthing velocity when considering the ship's size and the berthing capacity. A regression equation for the allowable berthing velocity by ship size was derived by calculating the designed berthing energy for each fender performance. It was also verified whether any ships were exceeding the allowable berthing velocity by comparing it with the measured data for each jetty. In addition, the extrapolated velocity was proposed using the regression equation, and as a result of applying the measured data, 11 ships exceeded the designed velocity in jetty 1, but it was confirmed that all ships were safely berthed in jetty 2,3. Therefore, the target pier of this study was evaluated as a pier where ships can be berthed safely. A safer berthing velocity operation guideline can be suggested if the allowable berthing velocity by ship size is analyzed and utilized at various piers. Extrapolated velocity can also be used for risk analysis of berthing.

Analysis of the Navigation Criteria of Passing Vessel for the Mooring Safety in Adjacent Berth to the Fairway

“…. 또한, 부두 이용 선박의 규모를 고려하여 적절한 부두 계류 장치를 설치하여 야 하며, 설계 접안에너지에 따라 적절한 접안속도로 선박 을 운항하는 등 부두 운영을 위한 적절한 관리가 요구된다 (Kang et al, 2021). 항만의 건설 이후에도 부두의 노후화 및 계류 선박의 대형화 등을 고려하여 계류 환경 개선을 위한 고민이 필요하다 (Kim et al, 2021) 임민정⋅조익순 - Moment / LBP (ton)…”