Structural Aspects During Conversion From General Cargo Ships to Cement Carriers

Jurišić, Paul; Parunov, Joško

doi:10.21278/brod72203

Cited by 1 publication

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“…Their study is vital for ship hull design and safety, as it clarifies how to ensure structural strength and how ships behave under various loading conditions. Jurišić and Parunov [6] assessed the strength of two general cargo ships and found sufficient stress levels and safety parameters in all loading conditions. The stress distributions for specified load circumstances met the Croatian Registry of Shipping rules, suggesting an acceptable and redundant ship structure.…”

Section: Introductionmentioning

confidence: 99%

Linear Longitudinal Strength Analysis of a Multipurpose Cargo Ship under Combined Bending and Torsional Load

Abedin,

Franklin,

Mahmud

2023

JMSE

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Cargo ships with wide hatches usually have thin walls and limited torsional rigidity. Consequently, conducting a comprehensive torsional analysis is important because these loads can exert a significant impact. In this paper, the structural response of a multipurpose cargo ship to combined bending and torsional loads is studied using finite element analysis. The bending and torsional moments are calculated following the rules and standard regulations followed by the classification society. The ship’s 3D finite element model was verified using beam theory and direct calculations. In contrast, the accuracy of torsional stress was confirmed by comparing thin wall girder theory with direct calculation results. This study thoroughly examined the impacts of the still water bending moment, the vertical wave bending moment, and the wave-induced torsional moment on the structural response of ships. Furthermore, it scrutinised the impact of torsion on both open-deck and closed-deck ships. Hull girder normal stresses at midship due to still water and the vertical wave bending moment are shown to contribute to almost 70% of total stress in an inclined condition; stresses resulting from the horizontal wave bending moment contribute nearly 10%, while warping stresses contribute approximately 20% in open-deck ships. It is also shown that torsion has little impact on closed-deck ships. Finally, a buckling analysis was conducted to assess the ship’s buckling criteria, confirming that the linear buckling criteria were satisfied.

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Section: Introductionmentioning

confidence: 99%