Numerical analysis on structural strength of a cone-shaped flatted revolution body during high-speed water-entry

HUANG Zhigang; SUN Tiezhi; YANG Biye; ZHANG Guiyong; ZONG Zhi

doi:10.11883/bzycj-2017-0330

Volume 39 Issue 4

Mar. 2019

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HUANG Zhigang, SUN Tiezhi, YANG Biye, ZHANG Guiyong, ZONG Zhi. Numerical analysis on structural strength of a cone-shaped flatted revolution body during high-speed water-entry[J]. Explosion And Shock Waves, 2019, 39(4): 043201. doi: 10.11883/bzycj-2017-0330

Citation:

HUANG Zhigang, SUN Tiezhi, YANG Biye, ZHANG Guiyong, ZONG Zhi. Numerical analysis on structural strength of a cone-shaped flatted revolution body during high-speed water-entry[J]. Explosion And Shock Waves, 2019, 39(4): 043201. doi: 10.11883/bzycj-2017-0330

Citation:

HUANG Zhigang, SUN Tiezhi, YANG Biye, ZHANG Guiyong, ZONG Zhi. Numerical analysis on structural strength of a cone-shaped flatted revolution body during high-speed water-entry[J]. Explosion And Shock Waves, 2019, 39(4): 043201. doi: 10.11883/bzycj-2017-0330

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Numerical analysis on structural strength of a cone-shaped flatted revolution body during high-speed water-entry

doi: 10.11883/bzycj-2017-0330

HUANG Zhigang^1
,,
SUN Tiezhi¹,
YANG Biye¹,
ZHANG Guiyong^{1, 2, 3
,
,},
ZONG Zhi^{1, 2, 3}

1.
Liaoning Engineering Laboratory for Deep-Sea Floating Structures, School of Naval Architecture, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, Liaoning, China
3.
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China

Received Date: 2017-09-08
Rev Recd Date: 2018-01-10

Available Online: 2019-03-25

Publish Date: 2019-04-01

Abstract

Abstract

In order to investigate the structural strength of a cone-shaped flatted revolution body during high-speed water-entry, based on the nonlinear finite element software LS-DYNA, which adopts the arbitrary Lagrangian-Eulerian (ALE) algorithm, the paper analyzes the characteristics of impact force and strength for the different structural revolution bodies with the initial velocity of 100 m/s. The results show that the peak impact pressure intensity and the velocity attenuation of the revolution body during water-entry agree well with the theoretical values, which can effectively verify the validity of the present numerical method. Besides, the peak value of the impact load occurs at the initial stage of the water-entry and the period is very short. After the revolution body enters the surface of the water, the impact load becomes smaller rapidly and changes slightly. The structural style of the revolution body has great effect on its strength during the water-entry, especially the head thickness of the revolution body. When the head thickness of the revolution body is 8 mm and the wall thickness of its afterbody is larger than 2.5 mm, the structure has no damage during the water-entry.
- high-speed revolution body,
- water entry,
- structure strength,
- fluid-structure interaction

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References(21)

References

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