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Towards a flexible fast-running blast effects module for V/L TARVAC

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Author: Boonacker, B. · Halswijk, W.H.C. · Westerhof, T.A.T. · Eeuwhorst, T.R. · Verhagen, T.L.A.
Type:article
Date:2015
Source:16th ISIEMS International Symposium for the Interaction of the Effects of Munitions with Structures, Destin, Florida, USA, 9-13 November 2015
Identifier: 529325
Keywords: Physics · Blast effects · Wall response · Non-symmetric loading · V/L Assessment · TARVAC · Observation, Weapon & Protection Systems · EBP - Explosions, Ballistics & Protection WS - Weapon Systems · TS - Technical Sciences

Abstract

TNO is developing a flexible blast effects module suited to be used in simulations of MOUT scenarios within a VL simulation environment for assessing structural damage and human injuries due to blast load-ing. VL simulations should run in seconds to enable Monte Carlo simulations as well as deal with various ammunition – target engagement situations. The aim of the blast effects module is to bridge the gap between semi-empirical free-air blast relations (thus improving the simulation time performance) and CFD (thus improving the simulation physical fidelity). The module should be suited for a large variety of targets, geometries, including indoor and outdoor sce-narios, and therefor flexible, i.e. easy to adapt to specific geometric complexity as part of an urban scenar-io. Not all theoretical required modelling information will be available in real MOUT scenarios; VL study parameters will often be based on subject matter experts situation interpretation and appreciation, keeping in mind the opportunities as well as limitations offered by the underlying VL modules. The blast effects module includes models for 1) the blast initiation and propagation, 2) blast loading of personnel or structures and 3) structural and human response. The first two models jointly form the BeamBlast model. Additional requirements are to extend the current geometrical/physical modelling to be able to cope with infrastructure targets and specific blast input parameters. This paper provides an overview of the current TARVAC simulation code and the newly developed mod-ule. The geometrical extension of the current version is described, as are the two parts of the module, the BeamBlast model and the response models. An outlook is given into future developments, such as the implementation of venting and blast wave coalescence and the study on the wall response modelling of non-uniform loading. The blast effect module is suited for vulnerability/lethality (V/L) assessments and will be implemented in the TNO V/L TARVAC simulation suite.