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Citation:
　Mika Hernandez Ramos,Mingzhen Wang,Xueqian Zhou,et al.Enhanced Design Equations for the Residual Strength Index of Oil Tankers Subjected to Collision and Grounding[J].Journal of Marine Science and Application,2026,(4):980-999.[doi:10.1007/s11804-025-00700-w]
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Enhanced Design Equations for the Residual Strength Index of Oil Tankers Subjected to Collision and Grounding

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Title:
Enhanced Design Equations for the Residual Strength Index of Oil Tankers Subjected to Collision and Grounding
Author(s):
Mika Hernandez Ramos1; 2; 3;  Mingzhen Wang4; 5;  Xueqian Zhou1; 2; 3;  Zhongjun Ding6;  Hongqiang Lyu4
Affilations:
Author(s):
Mika Hernandez Ramos1; 2; 3;  Mingzhen Wang4; 5;  Xueqian Zhou1; 2; 3;  Zhongjun Ding6;  Hongqiang Lyu4
1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China;
2. International Joint Laboratory of Naval Architecture and Offshore Technology between Harbin Engineering University and University of Lisbon, Harbin 150001, China;
3. Qingdao Key Laboratory of Marine Structure Environmental Adaptability, Qingdao 266000, China;
4. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
5. Key Laboratory of High-Speed Hydrodynamic Aviation Science and Technology, China Special Vehicle Research Institute, Jingmen 448035, China;
6. National Deep-Sea Center, Qingdao 266237, China
Keywords:
Ship collision and grounding; IACS-CSR; Progressive collapse method (PCM); Residual strength index (RSI); Oil tankers
分类号:
-
DOI:
10.1007/s11804-025-00700-w
Abstract:
In this study, we evaluate the residual longitudinal strength index of three double-hull oil tankers—Aframax, Suezmax, and very large crude carrier (VLCC)—based on collision and grounding scenarios by employing an improved progressive collapse method (PCM). We define the extent of damage based on the IACS-CSR. This study mainly contributes to the extraction of new quadratic equations, which are derived from 51 analytical simulations using curve-fitting. The objective is to establish the relationship between residual strength index (RSI) and damage size ratio (DSR). The proposed PCM incorporates the neutral axis (NA) rotation, overcoming a critical limitation in previous methodologies. Results indicate that not considering NA rotation can lead to a 26% overestimation of RSI. Furthermore, the results of grounding scenarios indicate a larger RSI reduction under hogging conditions than that under sagging conditions; this is attributed to the progressive deck failure and buckling of the inner bottom plating. A comparative analysis shows that inner hull damage significantly deteriorates the RSI reduction, emphasizing the need for refined structural integrity evaluations. Additionally, we analyze the factors affecting the longitudinal strength behavior of damaged ships. The newly extracted RSI-DSR equations and diagrams can be used in practice for rapid damage assessment and RSI estimation, contributing to improvements in ship structural safety and reliability.

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Memo

Memo:
Received date:2025-3-25;Accepted date:2025-5-20。<br>Foundation item:Funding Supported by Heilongjiang Province Funds for Key Technologies (Grant No. GZ20210139), National Science Foundation Council of China (Grant No. 52171301), Shandong Province Funds for Key Technologies (Grant No. 2020CXGC010702), and a research grant (Grant No. ZH2022012). The first author was supported by the Marine Scholarship of China (2023SOA010976).<br>Corresponding author:Xueqian Zhou，E-mail:xueqian.zhou@hrbeu.edu.cn
Last Update: 2026-10-16