Experiments on Cumulative Damage to Hull Girders Subjected to Multiple Underwater Explosions

TANG Zheng-peng; LI Xiang-yu

doi:10.11993/j.issn.2096-3920.2022.03.012

Volume 30 Issue 3

Jul 2022

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Article Navigation > Journal of Unmanned Undersea Systems > 2022 > 30(3): 364-370

TANG Zheng-peng, LI Xiang-yu. Experiments on Cumulative Damage to Hull Girders Subjected to Multiple Underwater Explosions[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 364-370. doi: 10.11993/j.issn.2096-3920.2022.03.012

Citation:

TANG Zheng-peng, LI Xiang-yu. Experiments on Cumulative Damage to Hull Girders Subjected to Multiple Underwater Explosions[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 364-370. doi: 10.11993/j.issn.2096-3920.2022.03.012

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Experiments on Cumulative Damage to Hull Girders Subjected to Multiple Underwater Explosions

doi: 10.11993/j.issn.2096-3920.2022.03.012

TANG Zheng-peng^{1, 2},
LI Xiang-yu^1
,

1.
College of Arts and Sciences, National University of Defense Technology, Changsha 410073, China
2.
91439^th Unit, The People’s Liberation of Army, Dalian 116000, China

Received Date: 2022-03-14
Accepted Date: 2022-04-28
Rev Recd Date: 2022-04-20

Available Online: 2022-06-27

Abstract

Abstract

For the cumulative damage analysis of hull girders, cumulative damage tests on hull girders subjected to multiple underwater explosions were conducted and the factors affecting cumulative damage were considered, including explosion distance, explosion time, and other parameters. A damage level model for hull girders was established based on the ratio of deflection to the half-length of a hull girder. The results demonstrate that a hull girder does not undergo plastic deformation under the action of medium- and far-field underwater explosion loading. Under the action of near-field explosion loading, a hull girder produces two deformation modes: local plastic deformation of the middle depression and overall plastic bending deformation of the middle arch. With a decrease in the explosion distance, the overall deflection of the hull girder increases. Under the same conditions, the cumulative deflection of a hull girder is approximately linearly correlated with the cumulative loading time of an explosion.
- multiple underwater explosions,
- hull girder,
- cumulative damage,
- damage level

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References(11)

References

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