DOI QR코드

DOI QR Code

국내 연안 카페리 차량 고박 장치 안전성에 관한 연구: 제2부 가속도 예측 방법에 따른 고박 안전도 비교 연구

Study on Structural Safety of Car Securing Equipment of Coastal Carferry: Part II Assessment of Lashing Safety according to Acceleration Prediction Approaches

  • Choung, Joonmo (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Jo, Huisang (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Lee, Kyunghoon (Korea Ship Safety Technology Authority) ;
  • Lee, Young Woo (Korea Ship Safety Technology Authority)
  • 투고 : 2016.09.05
  • 심사 : 2016.12.16
  • 발행 : 2016.12.31

초록

For a carferry with a displacement of 1,633 tonf, a seakeeping analysis-based direct load approach (DLA) was used in Part I of these series, where the final deliverable was the long-term probabilistic acceleration components. In Part II of these series, the tangential acceleration components are explained based on two approaches: a standard called the IMO CSS code and simple formulas with the probable maximum roll and pitch rotations. The subsequent tangential acceleration-induced external force components are also introduced for these two approaches. The lashing strength components were selected from the IMO CSS code. It was assumed that two different vehicles (a car and a truck) were stowed at the most distant locations on the main deck to assume the largest tangential acceleration components and were secured with four steel wires with longitudinal and transverse lashing angles of $45^{\circ}$. Four cases were considered, with different methods for predicting the acceleration components and different tools for the external loads and lashing strengths involved: cases Rule-LS (rule-based maximum probable roll and pitch angles for predicting the acceleration components in conjunction with LashingSafety), DLA-LS (seakeeping-based long-term acceleration components with LashingSafety), CSS-LC (IMO CSS code-based acceleration components using LashCon), and CSS-LS (IMO CSS code-based acceleration components using LashingSafety). In terms of the acceleration and external force components, the CSS-LC and CSS-LS results are more than two times the results of Rule-LS. Thus, when the external forces and lashing strengths are evaluated using CSS-LC and CSS-LS, the truck needs more lashing wires, while Rule-LS and DLA-LS predict that the present lashing configuration is on the safe side.

키워드

참고문헌

  1. International Maritime Organization(IMO), 2011. Code of Safe Practice for Cargo Stowage and Securing.
  2. Jo, H., Choung, J., Lee, K., 2016. Force Equilibrium-Based Safety Assessment System for Cargo Securing of Car Ferries. Proceedings of the 26th International Ocean and Polar Engineering Conference, Rhodes, Greece.
  3. Ministry of Land, Infrastructure, Transport and Tourism (MLIT), 2015. On Cargo Securig of Ocean-Going RORO ships(in Japanese). [Online] Available at: [Accessed March 2015].
  4. Det Norske Veritas(DNV), 2003. LASHCON IMO User Guide. [Online] Available at: [Accessed September 2015].
  5. Korea Register of Shipping(KR), 2016. Rules for the Classification of Steel Ships Part 7 Ships of Special Service. [Online] Available at: [Accessed September 2016].