Speaker
Description
Stiffened panels are widely used in offshore and maritime sectors where buckling is a common cause of failure. The DNV RP-C201 and NS-EN 1993-1-5 guidelines are commonly used to calculate buckling capacities of these panels analytically, while non-linear finite element method can also be used with guidelines outlined in DNV-RP-C208. However, studies related to validation/calibration of the capacity of large ship hull stiffened panels using these standards are lacking. This paper presents an application of non-linear finite element analysis to evaluate the buckling capacity of stiffened panels for ship hulls, and to compare the results with those obtained by the conven-tional code DNV-RP-C201. A capacity benchmark was established by com-paring results for a plated panel, and a validated non-linear model was de-veloped using the general purpose finite element analysis program ABAQUS. Material and geometrical nonlinearities were introduced to achieve calibra-tion to the benchmark buckling capacity, with a mid-stiffener span imperfec-tion magnitude ranging from 0,06% to 1% of the stiffener span length intro-duced to achieve 99,7% calibration. The validated non-linear model was then used to evaluate the effect of holes on buckling capacity under uniaxial and gravity loads. Results showed that the non-linear buckling capacity re-duction of the model correlated with the stiffeners and plate x-direction cross-sectional area reduction resulting from the hole in the plate.
| Conference Topic Areas | Track3: Computational Mechanics and Structural Integrity |
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