Dynamic simulation of fast attack craft subjected to Underwater Explosion (UNDEX)

Juha Virtanen; Markku Juntunen

Dynamic simulation of fast attack craft subjected to Underwater Explosion (UNDEX)

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

Abstract

In this paper the dynamic simulation of a new Fast Attack Craft subjected to underwater explosion (UNDEX) is discussed. Field response results of a global model containing the whole structure are presented. The surrounding water enabling the cavitation phenomenon was included into the model as acoustic domain. In addition, the effects of gravity and buoyancy were included into the analysis. As excitations to the model shockwave and free surface reflections were used. Filtering was used to control the frequency content of charge detonation excitations.The Fast Attack Craft hull is constructed of aluminum alloy. Nonlinear Ramberg-Osgood plasticity model and Cowper-Symonds power law model for strain rate effects and failure conditions were included into the material model. Analyses were carried out by using Abaqus finite element code in a multi-processor Linux computer.

Original language	English
Title of host publication	Proceedings of the 77th Shock and Vibration Symposium
Place of Publication	USA
Publication status	Published - 2006
MoE publication type	B3 Non-refereed article in conference proceedings
Event	77th Shock & Vibration Symposium - Monterey, CA, United States Duration: 29 Oct 2006 → 2 Nov 2006

Conference

Conference	77th Shock & Vibration Symposium
Country	United States
City	Monterey, CA
Period	29/10/06 → 2/11/06

Keywords

UNDEX
shock response
Abaqus
underwater explosion
cavitation

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@inproceedings{e8f8869c7ef94e5bb270eab70c4c031c,

title = "Dynamic simulation of fast attack craft subjected to Underwater Explosion (UNDEX)",

abstract = "In this paper the dynamic simulation of a new Fast Attack Craft subjected to underwater explosion (UNDEX) is discussed. Field response results of a global model containing the whole structure are presented. The surrounding water enabling the cavitation phenomenon was included into the model as acoustic domain. In addition, the effects of gravity and buoyancy were included into the analysis. As excitations to the model shockwave and free surface reflections were used. Filtering was used to control the frequency content of charge detonation excitations.The Fast Attack Craft hull is constructed of aluminum alloy. Nonlinear Ramberg-Osgood plasticity model and Cowper-Symonds power law model for strain rate effects and failure conditions were included into the material model. Analyses were carried out by using Abaqus finite element code in a multi-processor Linux computer.",

keywords = "UNDEX, shock response, Abaqus, underwater explosion, cavitation",

author = "Juha Virtanen and Markku Juntunen",

note = "Project code: 4446; 77th Shock & Vibration Symposium ; Conference date: 29-10-2006 Through 02-11-2006",

year = "2006",

language = "English",

booktitle = "Proceedings of the 77th Shock and Vibration Symposium",

}

TY - GEN

T1 - Dynamic simulation of fast attack craft subjected to Underwater Explosion (UNDEX)

AU - Virtanen, Juha

AU - Juntunen, Markku

N1 - Project code: 4446

PY - 2006

Y1 - 2006

N2 - In this paper the dynamic simulation of a new Fast Attack Craft subjected to underwater explosion (UNDEX) is discussed. Field response results of a global model containing the whole structure are presented. The surrounding water enabling the cavitation phenomenon was included into the model as acoustic domain. In addition, the effects of gravity and buoyancy were included into the analysis. As excitations to the model shockwave and free surface reflections were used. Filtering was used to control the frequency content of charge detonation excitations.The Fast Attack Craft hull is constructed of aluminum alloy. Nonlinear Ramberg-Osgood plasticity model and Cowper-Symonds power law model for strain rate effects and failure conditions were included into the material model. Analyses were carried out by using Abaqus finite element code in a multi-processor Linux computer.

AB - In this paper the dynamic simulation of a new Fast Attack Craft subjected to underwater explosion (UNDEX) is discussed. Field response results of a global model containing the whole structure are presented. The surrounding water enabling the cavitation phenomenon was included into the model as acoustic domain. In addition, the effects of gravity and buoyancy were included into the analysis. As excitations to the model shockwave and free surface reflections were used. Filtering was used to control the frequency content of charge detonation excitations.The Fast Attack Craft hull is constructed of aluminum alloy. Nonlinear Ramberg-Osgood plasticity model and Cowper-Symonds power law model for strain rate effects and failure conditions were included into the material model. Analyses were carried out by using Abaqus finite element code in a multi-processor Linux computer.

KW - UNDEX

KW - shock response

KW - Abaqus

KW - underwater explosion

KW - cavitation

M3 - Conference article in proceedings

BT - Proceedings of the 77th Shock and Vibration Symposium

CY - USA

T2 - 77th Shock & Vibration Symposium

Y2 - 29 October 2006 through 2 November 2006

ER -