Numerical simulation of nonlinear structural responses of an arch dam to an underwater explosion

The food processing technology using a shock wave can prevent deterioration of the food by heat because it can process food in a short time. Generally, since the shock wave used for food processing is generated by underwater explosion, the load of a shock wave to the food becomes very complicated. Therefore, in order to process safely, it is important to clarify the behaviors of the shock wave and the bubble pulse generated by underwater explosion. In this research, in order to investigate the behavior of the shock wave in the water tank used for food processing, the optical observation experiment and the numerical simulation were performed. In the experiment, the shock wave generated by underwater explosion was observed with the high-speed video camera. The numerical simulation about the behavior of bubble pulse was performed using analysis software LS-DYNA. Comparing and examining were performed about the experimental result and the numerical simulation result. The result of the numerical simulation about the behavior of the shock wave generated by underwater explosion and the shock wave generated by the bubble pulse and the bubble pulse was well in agreement with the experimental result.

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Numerical simulation method for arch dam stability-evaluation

Frontiers of Rock Mechanics and Sustainable Development in the 21st Century ◽

10.1201/9781003077510-64 ◽

2020 ◽

pp. 279-282

Author(s):

Zhou Weiyuan ◽

Liu Yuangao ◽

Liu Yaoru ◽

Yang Ruoqiong

Keyword(s):

Numerical Simulation ◽

Simulation Method ◽

Arch Dam ◽

Stability Evaluation ◽

Numerical Simulation Method ◽

Dam Stability

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Simulation Study on Tapered and Spherical Shaped Charge under Underwater Explosion

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.157-158.852 ◽

2012 ◽

Vol 157-158 ◽

pp. 852-855

Author(s):

Fang Yi Zhou ◽

Tao Jiang ◽

Wei Li Wang ◽

Fa Min Zhan ◽

Ke Yu Zhang

Keyword(s):

Numerical Simulation ◽

Stress Distribution ◽

Simulation Study ◽

Underwater Explosion ◽

Shaped Charge ◽

Damage Effect ◽

Tapered Angle ◽

Underwater Target ◽

Shaped Charge Jet

For improving the damage effect to underwater target of warhead, a kind of metamorphic tapered angle shaped charge is designed, and the damge mechanism is analyzed. The physics modle of tapered and spherical shaped charge under underwater explosion is built, numerical simulation is done by LS-DYNA, the stress distribution and velocity of jet are got. The result shows that the shaped charge jet formed by this kind of structure can provide moving space for latter EFP, which improving the damage effect to target.

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Numerical simulation of structural responses to a far-field explosion

Australian Journal of Structural Engineering ◽

10.1080/13287982.2015.1092686 ◽

2015 ◽

Vol 16 (3) ◽

pp. 226-236 ◽

Cited By ~ 4

Author(s):

Chao Ding ◽

Tuan Ngo ◽

Abdallah Ghazlan ◽

Raymond Lumantarna ◽

Priyan Mendis

Keyword(s):

Numerical Simulation ◽

Far Field ◽

Structural Responses

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An Adaptive Mesh Method to Speed up the Numerical Simulation of an Underwater Explosion

Shock Waves @ Marseille III ◽

10.1007/978-3-642-78835-2_48 ◽

1995 ◽

pp. 285-288

Author(s):

Philippe Boyce ◽

Thierry Hocquellet

Keyword(s):

Numerical Simulation ◽

Underwater Explosion ◽

Adaptive Mesh ◽

Adaptive Mesh Method ◽

Mesh Method ◽

Speed Up

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Numerical Simulation and Response of Stiffened Plates Subjected to Noncontact Underwater Explosion

Advances in Materials Science and Engineering ◽

10.1155/2014/752586 ◽

2014 ◽

Vol 2014 ◽

pp. 1-17 ◽

Cited By ~ 6

Author(s):

Elsayed Fathallah ◽

Hui Qi ◽

Lili Tong ◽

Mahmoud Helal

Keyword(s):

Numerical Simulation ◽

Underwater Explosion ◽

Design Guidelines ◽

Nonlinear Finite Element ◽

Steel Plates ◽

Stiffened Plates ◽

Shock Loads ◽

Floating Structures ◽

Underwater Shock ◽

Overall Performance

A numerical simulation has been carried out to examine the response of steel plates with different arrangement of stiffeners and subjected to noncontact underwater explosion (UNDEX) with different shock loads. Numerical analysis of the underwater explosion phenomena is implemented in the nonlinear finite element code ABAQUS/Explicit. The aim of this work is to enhance the dynamic response to resist UNDEX. Special emphasis is focused on the evolution of mid-point displacements. Further investigations have been performed to study the effects of including material damping and the rate-dependant material properties at different shock loads. The results indicate that stiffeners configurations and shock loads affect greatly the overall performance of steel plates and sensitive to the materials data. Also, the numerical results can be used to obtain design guidelines of floating structures to enhance resistance of underwater shock damage, since explosive tests are costly and dangerous.

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