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Underwater Explosion (UNDEX) Phenomenon and Response of Marine Combatants to UNDEX Loading

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Abstract

This paper reviews prominent published works on UNDEX phenomenon and associated load characterization on structures subjected to UNDEX. An overview of characteristic events associated with UNDEX phenomenon resulting in a transient dynamic loading on the structure has been presented. A load characterization methodology for far-field UNDEX, based on empirical calculation of incident pressure load time history on the structure due to an explosive charge of known weight and standoff distance. The presented UNDEX load characterization includes the effect of FSI based on Taylor’s theory for the estimation of the modified transient pressure filed. Salient features in numerical modelling and simulations of non-linear structural responses and dynamic effects due to UNDEX have been highlighted. Significance of zoning from design against shock for shipboard equipment and scope of FEA numerical simulations using a high performance computing (HPC) setup for validation of loads corresponding to a given shock grade/standard, and its importance in optimizing platform designs against shock hardening requirements, have also been discussed briefly.

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Authors and Affiliations

  1. Indian Navy, New Delhi, India

    Nagesh

  2. Applied Mechanics Department, IIT Delhi, New Delhi, India

    N. K. Gupta

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  1. Nagesh
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Nagesh, Gupta, N.K. Underwater Explosion (UNDEX) Phenomenon and Response of Marine Combatants to UNDEX Loading. Mech. Solids 58, 338–351 (2023). https://doi.org/10.3103/S0025654422601318

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