Simulation of the Behavior of a Ship Hull under Grounding: Effect of Applied Element Size on Structural Crashworthiness

Mathematical Problems in Engineering

Tuswan

Nurcholis

et al. 2021

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Thin-walled stiffened panels are fundamental structural components that form the primary structure of the ship hull. The effectiveness of the stiffener configuration design needs to be assessed because members are unavoidably subjected to various load types during operations. In this situation, assessment is required to quantify the responses and determine the relationship between the structural resistance and input parameters. The aim of this work was to obtain structural resistance data on the stiffened side hull of a medium-sized tanker with various model configurations by using finite element analysis with different loading parameters, i.e., load type and angle, as the main inputs. The results indicate that stiffener configurations subjected to loads at the center and random positions influence the effectiveness in reducing the deformation. The results show that the stiffener is more effective when the location of the force is very close to the stiffener. Therefore, higher strength can be obtained with a design in which the area that is not supported by the stiffener is minimized.

Section: Mesh Convergence: Plate With One Longitudinal Stiffenermentioning

confidence: 99%

Structural Resistance of Simplified Side Hull Models Accounting for Stiffener Design and Loading Type

Mathematical Problems in Engineering

Tuswan

Nurcholis

et al. 2021

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“…Explicit FE Methodology. The impact attenuator crash is classified in a nonlinear dynamic event requiring the appropriate calculative method for resolving its almost-limitless scenario [23,[32][33][34]. Nonlinearity is integrated into the analysis, as underlying principles of linear analysis are contradicted by materials and structures that surpass its yield limit.…”

Section: Mathematical Formulae and Algorithmmentioning

confidence: 99%

Crashworthy Examination of a Newly Proposed Impact Attenuator Design: Experimental Testing and Numerical Analysis

Prasetya

Modelling and Simulation in Engineering

Ubaidillah

et al. 2021

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The impact attenuator is a safety vehicle system designed to absorb the kinetic energy from a collision that is converted into deformation and ensures the deceleration level acting on the human body remains low. In this paper, we propose that the impact attenuator be fabricated with used cans, which are easy to obtain. Compared to fabricating cylinders through machining and other production processes using new material, the application of used cans may reduce production costs by approximately IDR 500,000 (USD 34.50) for one attenuator structure, while the attenuator still meets the weight criterion, i.e., it has to be light to improve acceleration and fuel efficiency. As a type of metal waste product, food cans are often fabricated from aluminum and other metal alloys. These products are widely used in our lives; if they are not recycled, they can potentially pollute the environment as waste. Given these problems and considering the use of environmentally friendly materials, lightweight used cans were chosen as materials for the proposed impact attenuator design. In the initial study, the verification and validation tests of the impact attenuator shell and used cans show good agreement between the numerical and experimental impact tests. The proposed impact attenuator design under the predetermined parameters showed that used cans of aluminum 6063 series can be recommended as an alternative material in this system.

“…Considering safety demand from society regarding maritime operations, ship structure is developed to be more robust during accidental situations, such as under impact loading. Double hull structures [14][15][16][17] are proposed to be implemented, especially for dangerous carriers. The structures are initially intended for tanker ship.…”

Section: Hull Structure and Freight Containermentioning

confidence: 99%

Investigation of structural performance subjected to impact loading using finite element approach: case of ship-container collision

Curved and Layered Structures

Laksono

Sohn

2020

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Transporting mass products from one country to others is essential activities in industrial cycle. Ships are selected as reliable carriers for this objective considering traveling time and operational cost. During its operational, accidental events such as storm, high tide and bad weather may cause the products which are usually packed in freight containers fall into sea, and impacts the ship structure. In this situation, casualties on both involved structures can be detrimental. This work analyzes a series of ship-container collision in maritime territory in order to investigate resulting structural phenomena. The finite element approach is selected to solve the designed collision cases where the discussion is directed to selected crash-worthiness criteria. Impact speed between ship and container structures is chosen as the main parameter in the designed scenario by judging whether this parameter is a good representative of sea state. Overall results indicate that the indication for container rebounding after impact was high. It was followed by a significant increment of the internal energy after higher velocity, which was more than 5 m·s−1, had been applied to the scenario. Quantification of specific structural performance suggests that approximately more than 80% of the damage occurrs on the contacted area of the container structure.