scholarly journals Capsizing Probability of Dead Ship Stability in Beam Wind and Wave for Damaged Ship

2019 ◽  
Vol 33 (2) ◽  
pp. 245-251
Author(s):  
Li-fen Hu ◽  
Ke-zheng Zhang ◽  
Xiao-ying Li ◽  
Run-xin Chang
Keyword(s):  
Ship Stability ◽  
Capsizing Probability ◽  
Damaged Ship

The Direct Evaluation Method of Dead Ship Stability for Intact Ship

2019 ◽  
Vol 161 (A3) ◽  
Keyword(s):  
Second Generation ◽  
Evaluation Method ◽  
Stability Criteria ◽  
Ship Stability ◽  
Direct Evaluation ◽  
Intact Stability ◽  
Capsizing Probability ◽  
The Dead ◽  
The Difference ◽  
Effective Wave

The International Maritime Organization is currently establishing second generation intact stability criteria, the dead ship stability is considered one important criterion, so the development of its direct stability assessment regulation has become a topic undergoing close review. In this paper a peak-over-threshold (POT) method is proposed to evaluate the dead ship stability, which focuses on the statistical extrapolation that exceed the threshold, also the traditional Monte Carlo simulation is carried out to approve the method. On the basis of verification calculation of the sample ship CEHIPAR2792, the capsizing probability of a certain warship is also conducted. Moreover, the influence of initial stability height GM and effective wave slope coefficient on the capsizing probability is analysed. The results and the possible reason for the difference are examined. This study is expected to provide technical support for the second-generation stability criteria and establish the capsizing probability of damaged dead ship stability.

Capsizing Performance of Dead Ship Stability for Damaged Ships

2021 ◽  
Vol 55 (1) ◽  
pp. 115-126
Author(s):  
Lifen Hu ◽  
Chen Yao ◽  
Wubin Li ◽  
Xiangyang Wang ◽  
Zhongyu Sun
Keyword(s):  
Time Domain ◽  
Probability Model ◽  
Ship Stability ◽  
Significant Development ◽  
Capsizing Probability ◽  
Time Calculation ◽  
The Difference ◽  
The Time Domain ◽  
Visual Basic 6.0 ◽  
Curve Solution

AbstractThis study proposes a method for combining capsizing probability and flooding process to investigate the time-domain dead ship stability of a damaged ship. It focuses on a nonlinear righting lever GZ curve solution in the following aspects: one aspect subjects the influence of damaged tanks on a hull shape to the wind and wave, and the other aspect is based on a real-time calculation of the GZ curve. According to 1‐degree-of-freedom rolling equation, the damaged capsizing probability model is established through fourth-order Runge-Kutta algorithm and Monte Carlo simulation. Also, the model solution is applied on the basis of Visual Basic 6.0 language, and the results are compared with the NAPA platform. The most significant development in this study is combining time-domain flooding process and capsizing probability calculation. To verify the proposed methods, two damaged fishery bureau vessels are used as the sample ships. Results of time-domain capsizing probability under different loading conditions are compared, and the difference and its possible reasons are analyzed.

The Direct Evaluation Method of Dead Ship Stability for Intact Ship

2019 ◽  
Vol 161 (A3) ◽  
Author(s):  
LF Hu ◽  
QZ Zhang ◽  
WY Zhang ◽  
HB Qi
Keyword(s):  
Second Generation ◽  
Evaluation Method ◽  
Stability Criteria ◽  
Ship Stability ◽  
Direct Evaluation ◽  
Intact Stability ◽  
Capsizing Probability ◽  
The Dead ◽  
The Difference ◽  
Effective Wave

The International Maritime Organization is currently establishing second generation intact stability criteria, the dead ship stability is considered one important criterion, so the development of its direct stability assessment regulation has become a topic undergoing close review. In this paper a peak-over-threshold (POT) method is proposed to evaluate the dead ship stability, which focuses on the statistical extrapolation that exceed the threshold, also the traditional Monte Carlo simulation is carried out to approve the method. On the basis of verification calculation of the sample ship CEHIPAR2792, the capsizing probability of a certain warship is also conducted. Moreover, the influence of initial stability height GM and effective wave slope coefficient on the capsizing probability is analysed. The results and the possible reason for the difference are examined. This study is expected to provide technical support for the second-generation stability criteria and establish the capsizing probability of damaged dead ship stability.

THE DIRECT EVALUATION METHOD OF DEAD SHIP STABILITY FOR INTACT SHIP

2021 ◽  
Vol 161 (A3) ◽  
Author(s):  
L F Hu ◽  
Q Z Zhang ◽  
W Y Zhang ◽  
H B Qi
Keyword(s):  
Second Generation ◽  
Evaluation Method ◽  
Stability Criteria ◽  
Ship Stability ◽  
Direct Evaluation ◽  
Intact Stability ◽  
Capsizing Probability ◽  
The Dead ◽  
The Difference ◽  
Effective Wave

The International Maritime Organization is currently establishing second generation intact stability criteria, the dead ship stability is considered one important criterion, so the development of its direct stability assessment regulation has become a topic undergoing close review. In this paper a peak-over-threshold (POT) method is proposed to evaluate the dead ship stability, which focuses on the statistical extrapolation that exceed the threshold, also the traditional Monte Carlo simulation is carried out to approve the method. On the basis of verification calculation of the sample ship CEHIPAR2792, the capsizing probability of a certain warship is also conducted. Moreover, the influence of initial stability height GM and effective wave slope coefficient Y on the capsizing probability is analysed. The results and the possible reason for the difference are examined. This study is expected to provide technical support for the second-generation stability criteria and establish the capsizing probability of damaged dead ship stability.

The impact of the inflow momentum on the transient roll response of a damaged ship

2016 ◽  
Vol 120 ◽  
pp. 346-352 ◽  
Author(s):  
Teemu Manderbacka ◽  
Pekka Ruponen
Keyword(s):  
The Impact ◽  
Damaged Ship

Hydraulic modelling of oil spill through submerged orifices in damaged ship hulls

2017 ◽  
Vol 130 ◽  
pp. 385-397 ◽  
Author(s):  
Monika Kollo ◽  
Janek Laanearu ◽  
Kristjan Tabri
Keyword(s):  
Oil Spill ◽  
Hydraulic Modelling ◽  
Ship Hulls ◽  
Damaged Ship

Study of Towing Characteristics of Damaged Ship

2021 ◽  
Vol 24 (1) ◽  
pp. 32-46
Author(s):  
Min-Guk Seo ◽  
Sungchul Hwang ◽  
Yong Ju Kwon ◽  
Dong-Min Park ◽  
Hyunseung Nam ◽  
...  
Keyword(s):  
Damaged Ship

An Approximate Method for Intact Stability of Fishing Vessels

1999 ◽  
Vol 36 (03) ◽  
pp. 171-174
Author(s):  
Hüseyin Yilmaz ◽  
Abdi Kükner
Keyword(s):  
Design Stage ◽  
Design Parameters ◽  
Preliminary Design ◽  
Ship Stability ◽  
Fishing Vessels ◽  
Initial Stability ◽  
Intact Stability ◽  
Preliminary Design Stage ◽  
Reduce Risk ◽  
Vessel Stability

It is well known that stability is the most important safety requirement for ships. One should have some information on ship stability at the preliminary design stage in order to reduce risk. Initial stability of ships is an important criterion and can be closely evaluated in terms of form parameters and vertical center of gravity. In this study, using some sample ship data, approximate formulations are derived by means of regression analysis for the calculations expressed in terms of ship preliminary design parameters that can easily provide approximate GM calculations. Thus designers can be provided with ship stability at the preliminary design stage, and also a set of appropriate design parameters for improving vessel stability can easily be determined.

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