Design of corner connection structures of box-type cabins subjected to internal blast loading

MA Yinliang; ZHANG Pan; CHENG Yuansheng; LIU Jun

doi:10.11883/bzycj-2021-0437

Volume 42 Issue 12

Dec. 2022

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MA Yinliang, ZHANG Pan, CHENG Yuansheng, LIU Jun. Design of corner connection structures of box-type cabins subjected to internal blast loading[J]. Explosion And Shock Waves, 2022, 42(12): 125102. doi: 10.11883/bzycj-2021-0437

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MA Yinliang, ZHANG Pan, CHENG Yuansheng, LIU Jun. Design of corner connection structures of box-type cabins subjected to internal blast loading[J]. Explosion And Shock Waves, 2022, 42(12): 125102. doi: 10.11883/bzycj-2021-0437

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Design of corner connection structures of box-type cabins subjected to internal blast loading

doi: 10.11883/bzycj-2021-0437

School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

Received Date: 2021-10-19
Rev Recd Date: 2022-06-19

Available Online: 2022-09-20

Publish Date: 2022-12-08

Abstract

Abstract

Semi-armor-piercing warhead is likely to penetrate into the inner space of warship to induce severe damage. Published research indicated that the corner part of ship cabin tended to fail first. In present study, the novel design of corner structure aims to improve the capability of explosion-proof of ship cabin. Motivated by this idea, six kinds of typical corner connection structures were designed using the concept of weakening converged shock wave, improving the structure stress and strain state, coordinating deformation and transforming failure modes. The LS-DYNA software was employed to investigate the dynamic response of cabin structure subjected internal blast loading. Lagrange shell element and solid element based on multi-material ALE algorithm are used to simulate steel structure and air region, respectively. The interaction between shock wave and structure was fulfilled using fluid-structure interaction algorithm. The accuracy of the numerical model proposed in present paper was validated by comparing the published experimental results. Main attention of present study focuses on the effects of corner connection structure on the maximum deflection, corner pressure and deformation/failure mode of cabin structure. It attempts to explore the failure mechanisms of cabin structure. Simulation results confirm that the corner position of cabin structure is susceptive to fail under internal blast loading. Compared with the original structure without corner connection, the existence of corner connection structure can obviously reduce the plastic deformation of cabin structure. To be specific, the corner connection in the flat-plate form could reduce the maximum deflection by up to 31.9% relative to the original structure. In addition, the application of the corner connection in the arc shape could decrease the equivalent plastic strain by about 60%. Moreover, the existence of corner connection structure could ameliorate the position of high plastic strain and the failure modes of cabin structure. In present study, the corner connections in flat-plate form, concave form and arc shape could effectively avoid the failure behavior of cabin corner.
- internal blast loading,
- corner connection structure,
- deformation/failure mode,
- explosion-proof,
- LS-DYNA

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References(18)

References

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