Distribution characteristics of underwater explosion damage of ships

SUN He; YAN Ming; DU Zhipeng; ZHANG Lei

doi:10.11883/bzycj-2023-0370

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SUN He, YAN Ming, DU Zhipeng, ZHANG Lei. Distribution characteristics of underwater explosion damage of ships[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0370

Citation:

SUN He, YAN Ming, DU Zhipeng, ZHANG Lei. Distribution characteristics of underwater explosion damage of ships[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0370

SUN He, YAN Ming, DU Zhipeng, ZHANG Lei. Distribution characteristics of underwater explosion damage of ships[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0370

Citation:

SUN He, YAN Ming, DU Zhipeng, ZHANG Lei. Distribution characteristics of underwater explosion damage of ships[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0370

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Distribution characteristics of underwater explosion damage of ships

doi: 10.11883/bzycj-2023-0370

SUN He^{1, 2
,},
YAN Ming¹,
DU Zhipeng^{2
,
,},
ZHANG Lei²

1.
School of Mechanical Engineering, Shenyang Universitv of Technology, Shenyang 110870, Liaoning, China
2.
Naval Academy, Beiing 100161, China

Received Date: 2023-10-10
Rev Recd Date: 2024-02-28

Available Online: 2024-02-29

Abstract

Abstract

Underwater explosions can cause serious damage to ships and other structures in the water, seriously endangering the vitality and combat capability of ships. Ships in the combat process by torpedoes or mines and other underwater weapons attack, the explosion produced by the breach continued multi-directional into the water, the ship unsinkability has a greater impact. In order to explore the underwater explosion damage distribution characteristics, carried out a real-scale near-field underwater explosion ship test, analyzed the test obtained along the direction of the ship's length of the acceleration as well as strain measurement point data, the use of acoustic-solid coupling method to calculate the shock wave and bubble jet load under the joint action of the whole ship structure of the damage, get the whole ship plastically deformed area of the depth of the depression is 85 cm, The depth of the plastic deformation area of the whole ship is 85 cm, the width of the “L” type breach is 30 cm, and the area of the breach is 0.2 m². Comparing and analysing the experimental and simulation data, the error in the size of the computed breach is less than 20%, and the position of the breach matches well, which verifies the accuracy of the model. The model was used to carry out simulation calculations under different blast distances, analyse the structural damage distribution in the calculation results, put forward the distributed damage pattern of the barge under the action of near-field underwater explosion load, and make it clear that in addition to the overall fracture of the structure of the ship, there is also a wide distribution of small cracks in the bulkheads, the outboard side of the plate and other parts of the ship's structural damage, when the impact factor decreases from 5.84 to 1.91, the size of the bilge breach decreases, the size of the breach decreases, the location of the breach is a good match, and the accuracy of the model is verified. Bilge breach size decreases, the number of cracks in the cabin increases, which indicates that the larger the burst distance, the greater the scope of the underwater explosive load on the ship, the bubble pulsating load will make the barge appear “whiplash movement” will appear as a whole fracture of the barge to form a fatal damage to the overall structure of the impact factor of 1.91-2.87, the bilge breach for the The bilge breakage is scattered small breakage. Research results in the port side, bulkhead and bilge connection for the weak parts, small cracks are distributed more, in the ship design process can focus on strengthening the protection. This paper provides a design reference for the damage and protection of ships under the action of underwater explosive loads.
- underwater explosion,
- model test,
- acoustic structure,
- damage distribution,
- contact explosion

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References(23)

References

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