Professional paper
https://doi.org/10.21278/brod70203
WATER ENTRY HYDROELASTICITY ANALYSIS OF LATTICE SANDWICH PANEL WITH IMPERFECTION: SIMULATION AND ENGINEERING MODEL
Wang Hao
orcid.org/0000-0003-4005-0689
; China Institute of Marine Technology & Economy, Peking 100081, China
Cheng Yuan-Sheng
; School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Pei Da-Ming
; China Institute of Marine Technology & Economy, Peking 100081, China
Hao Wei-Wei
; China Institute of Marine Technology & Economy, Peking 100081, China
Gan Lin
; Wuhan Secondary Ship Design & Research Institute, Wuhan 430074, PR China
Abstract
In the present work, the three dimensional (3D) hydroelasticity characteristics of imperfect lattice sandwich panel (ILSP) subjected to water entry via analytical prediction and numerical simulations are proposed. Firstly, numerical investigations are performed on water entry characteristics based on Arbitrary Eulerian-Lagrange (ALE) coupling method for modeling fluid-structure interaction (FSI) at an impact velocity of 5.0m/s. The results show the impact pressure on total FSI surface of ILSP is generally lower than that of the perfect lattice sandwich panel. Then a novel semi-analytical method to calculate the elastic constants of ILSP is introduced. Based on this approach, an engineering computational model is developed to predict the deformation of ILSP, in which the total deformation is separated into two parts; local field deformation and global field deformation. Good agreement between the numerical and analytical results is achieved. And the effects of geometric parameters such as the thickness of face sheet, height of ILSP and relative density of core are discussed.
Keywords
Imperfect lattice sandwich panel; Hydroelasticity; Fluid-structure interaction; Water entry
Hrčak ID:
218834
URI
Publication date:
30.6.2019.
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