The main goal of this study was to investigate the effects of selected ship collision parameter values on the characteristics of the absorbed energy in several ship collision scenarios. Non-linear simulations were per...The main goal of this study was to investigate the effects of selected ship collision parameter values on the characteristics of the absorbed energy in several ship collision scenarios. Non-linear simulations were performed using a finite element method （FEM） to obtain virtual experiment data. In the present research, the size of the side damage from a collision phenomenon were measured and used to verify the numerical configuration together with the calculation results using an empirical equation. Parameters in the external dynamics of a ship collision such as the location of the contact point and velocity of the striking ship were taken into consideration. The internal energy and deformation size on the side structure were discussed further in a comparative study. The effects of the selected parameters on several structural behaviors, namely energy, force, and damage extent were also observed and evaluated in this section. Stiffener on side hull was found to contribute significantly into resistance capability of the target ship against penetration of the striking bow. Remarkable force during penetration was observed to occur when inner shell was crushed as certain velocity was applied in the striking bow.展开更多
This work presents results of numerical analyses with focus on structural performance accounting for seabed topology,and investigation of energy formulae for application in calculation of grounding damage.Study in thi...This work presents results of numerical analyses with focus on structural performance accounting for seabed topology,and investigation of energy formulae for application in calculation of grounding damage.Study in this work is divided into three stages,i.e.finite element method(FEM)verification using laboratory experiment,numerical calculation of ship grounding using FEM,and comparison of the FEM results with empirical formulae of damage-energy calculation.Fundamental formula of Minorsky is considered with other improvement expression,such as Woisin and Zhang.Investigation suggested that the recent-developed expression produces the closest estimation to the verified FEM results.On the other hand,fundamental formulae of Minorsky is the farthest compared to the FEM,which indicates constant value in the expression needs to be more specific as improved in the Woisin formula.展开更多
文摘The main goal of this study was to investigate the effects of selected ship collision parameter values on the characteristics of the absorbed energy in several ship collision scenarios. Non-linear simulations were performed using a finite element method （FEM） to obtain virtual experiment data. In the present research, the size of the side damage from a collision phenomenon were measured and used to verify the numerical configuration together with the calculation results using an empirical equation. Parameters in the external dynamics of a ship collision such as the location of the contact point and velocity of the striking ship were taken into consideration. The internal energy and deformation size on the side structure were discussed further in a comparative study. The effects of the selected parameters on several structural behaviors, namely energy, force, and damage extent were also observed and evaluated in this section. Stiffener on side hull was found to contribute significantly into resistance capability of the target ship against penetration of the striking bow. Remarkable force during penetration was observed to occur when inner shell was crushed as certain velocity was applied in the striking bow.
文摘This work presents results of numerical analyses with focus on structural performance accounting for seabed topology,and investigation of energy formulae for application in calculation of grounding damage.Study in this work is divided into three stages,i.e.finite element method(FEM)verification using laboratory experiment,numerical calculation of ship grounding using FEM,and comparison of the FEM results with empirical formulae of damage-energy calculation.Fundamental formula of Minorsky is considered with other improvement expression,such as Woisin and Zhang.Investigation suggested that the recent-developed expression produces the closest estimation to the verified FEM results.On the other hand,fundamental formulae of Minorsky is the farthest compared to the FEM,which indicates constant value in the expression needs to be more specific as improved in the Woisin formula.
