The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation

The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation

The paper describes the enhancement of an existing gun dynamics simulation package, to introduce spin to the flexible shot model. The original one or two piece flexible shot model was based on finite element beam theory, and therefore spin needed to take into account the moments of inertia at each n...

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Main Author: David N. Bulman
Format: Article
Language:English
Published: Hindawi Limited 2001-01-01
Series:Shock and Vibration
Online Access:http://dx.doi.org/10.1155/2001/692638
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spelling doaj-c78eafe6907f47a6a8e211d9a7c8ab492020-11-24T23:26:21ZengHindawi LimitedShock and Vibration1070-96221875-92032001-01-0183-417518210.1155/2001/692638The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics SimulationDavid N. Bulman0Danby Engineering Ltd., High Gill House, Low Row, Richmond, North Yorkshire, DL11 6NE, UKThe paper describes the enhancement of an existing gun dynamics simulation package, to introduce spin to the flexible shot model. The original one or two piece flexible shot model was based on finite element beam theory, and therefore spin needed to take into account the moments of inertia at each node. Each node is therefore treated as an independently spinning body, each with its own spinning axes which can be related to the next node so that stiffness forces between them can be calculated. The stiffness coefficients are recalculated as deformation takes place, which is particularly important with long rod penetrators because of the high accelerations involved which induce buckling moments in the rod as it bends. The relationship between the nodes and the stiffness coefficients is maintained by updating the direction cosines for each node, plus a set for the overall beam.http://dx.doi.org/10.1155/2001/692638
collection DOAJ
language English
format Article
sources DOAJ
author David N. Bulman
spellingShingle David N. Bulman
The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation
Shock and Vibration
author_facet David N. Bulman
author_sort David N. Bulman
title The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation
title_short The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation
title_full The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation
title_fullStr The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation
title_full_unstemmed The Introduction of Spin to an Existing Flexible Shot Model within a Gun Dynamics Simulation
title_sort introduction of spin to an existing flexible shot model within a gun dynamics simulation
publisher Hindawi Limited
series Shock and Vibration
issn 1070-9622
1875-9203
publishDate 2001-01-01
description The paper describes the enhancement of an existing gun dynamics simulation package, to introduce spin to the flexible shot model. The original one or two piece flexible shot model was based on finite element beam theory, and therefore spin needed to take into account the moments of inertia at each node. Each node is therefore treated as an independently spinning body, each with its own spinning axes which can be related to the next node so that stiffness forces between them can be calculated. The stiffness coefficients are recalculated as deformation takes place, which is particularly important with long rod penetrators because of the high accelerations involved which induce buckling moments in the rod as it bends. The relationship between the nodes and the stiffness coefficients is maintained by updating the direction cosines for each node, plus a set for the overall beam.
url http://dx.doi.org/10.1155/2001/692638
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