Dynamic response of cylindrical shell structure subjected to underwater explosion
Date Issued
2005
Date
2005
Author(s)
Chou, Tsung-Lin
DOI
zh-TW
Abstract
The experimental and numerical studies of linear and nonlinear dynamic response of cylindrical shell structures with stiffener rings subjected to underwater explosion in a 4m×4m×4m water tank have been examined in this work. The dimensions of cylindrical structures are Length × Diameter × thickness = 90cm×30cm×1mm. Two models were examined:
- cylindrical shell structure with outside stiffener rings made of 1mm mild steel
- cylindrical shell structure with inside stiffener rings made of 1mm mild steel
The experiments of dynamic response of cylinder subjected to UNDEX were performed with different standoff distances, which were varied from 30cm to 190cm. The standoff from 50cm to 190cm were designed to observe the linear responses, and the standoff 30cm was used to observe the plastic failures of cylindrical structures.
The modified measured pressure data were used as incident pressure of shock wave.The numerical analysis for the same experimental model was performed forcomparison. The USA and LS/DYNA software systems were selected as analysis tools.
The accelerations and dynamic strains obtained from experiment and numerical analysis were compared.
Subjects
圓柱殼結構
水下爆炸
試驗
FEM
DAA
cylindrical structures
underwater explosion
experiment
Type
thesis
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