Low velocity impact of foreign object on stiffened plates
Perforation due to the falling of foreign bodies on the offshore structures is one of the key concerns in the field of structural design. These structural damages may be fatal and decrease the integrity of the overall structure. This provides the motivation for researchers to analyze and develop...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/69924 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Perforation due to the falling of foreign bodies on the offshore structures is one of the
key concerns in the field of structural design. These structural damages may be fatal
and decrease the integrity of the overall structure. This provides the motivation for
researchers to analyze and develop guidelines in this field. In this dissertation, a
numerical model of a low velocity foreign body impacting on a stiffened plate is
created. The numerical simulations of this model have been performed using
ABAQUS/CAE-Explicit. The numerical model is created in accordance with the
experimental set-up reported by Langseth and Larsen[ I]. The results of the simulation
are validated via comparison with the results of the published experimental data.
Good agreement was found between the numerical model and experiment. The
maximum velocity at which the plate does not undergo perforation and the minimum
velocity at which the plate is ·perforated was also found. The stiffened plate is
analyzed using different support condition to look at the effect of boundary
conditions. Few structural design suggestions with stiffeners are proposed to resist
against the plugging of plates for the future study in this area of research. |
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