Incremental explosive analysis and its application to performance-based assessment of stiffened and unstiffened plates

Biglarkhani, Masoud; Sadeghi, Keyvan

doi:10.22059/jcamech.2017.236722.157

Incremental explosive analysis and its application to performance-based assessment of stiffened and unstiffened plates

Document Type : Research Paper

Authors

Masoud Biglarkhani ¹

Keyvan Sadeghi ²

¹ Civil Engineering Department, Hormozgan University, Bandar Abbas, Iran

² Mechanical Engineering Department, Buein Zahrah Technical University, Qazvin 3451745346, Iran

10.22059/jcamech.2017.236722.157

Abstract

In this paper, the dynamic behavior of square plates with various thicknesses and stiffening configurations subjected to underwater explosion (UNDEX) are evaluated through a relatively novel approach which is called Incremental Explosive Analysis (IEA). The IEA estimates the different limit-states and deterministic assessment of plats’ behavior, considering uncertainty of loading conditions and dynamic nature of explosive loading. In this new approach, intensity parameter of explosive loading is enhanced in an incremental manner and response of the target plate is recorded for every depth-stand-off loading condition. Then, the multi IEA curves are derived from several simulation results. The fractiles method is employed to summarize large amount of IEA curves’ data in a predictive mode. In addition, some summarized damage probability indicators such as fragility curves are extracted that provide useful information for quantitative damage analysis of plates in UNDEX loading. Results show that the IEA is a promising method for performance-based assessment of marine structures subjected to UNDEX loading.

Keywords

Air-backed plate

Underwater explosion (UNDEX)

Depth parameter

Stand-off distance

Incremental explosive analysis (IEA)

Intensity parameter

Fragility

uncertainty

Subjects

Finite Element Methods

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