Analysis of Impact Load on Elastic Plate in Underwater Explosions with Modified Ghost Fluid Method

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2017, Vol. 34 ›› Issue (1): 1-9.

Analysis of Impact Load on Elastic Plate in Underwater Explosions with Modified Ghost Fluid Method

XU Liang¹, FENG Chengliang², LIU Tiegang²

1. China Academy of Aerospace Aerodynamics, Beijing 100074, China;
2. LMIB & School of Mathematics and Systems Science, Beihang University, Beijing 100191, China

Received:2015-10-31 Revised:2016-03-01 Online:2017-01-25 Published:2017-01-25

Abstract

Abstract: Effects of thickness and density of plate on impact load and cavitation evolution in non-contact underwater explosions are investigated.A modified ghost fluid method developed recently is extended to treat nonlinear interaction between compressible flow and elastic plate.With assumption that fracture of a plate does not occur, it discloses that relatively small thickness or density of plate weakens impact of blast wave on structure.Impact load tends to result of rigid wall boundary nonlinearly with increase of thickness or density.Furthermore, smaller thickness or density causes cavitation to occur earlier and creates a larger cavitation region.It delays and weakens secondary impact on structure induced by cavitation collapse as well.

Key words: underwater explosion, fluid-structure interaction, modified ghost fluid method, impact load, cavitation collapse

CLC Number:

O351.2
O383

XU Liang, FENG Chengliang, LIU Tiegang. Analysis of Impact Load on Elastic Plate in Underwater Explosions with Modified Ghost Fluid Method[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2017, 34(1): 1-9.

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