NDLI: Dynamic Response and Armature Critical Velocity Studies in an Electromagnetic Railgun

Content Provider	IEEE Xplore Digital Library
Author	Daneshjoo, K. Rahimzadeh, M. Ahmadi, R. Ghassemi, M.
Copyright Year	1965
Abstract	A model is developed to investigate the dynamic response of an electromagnetic railgun structure, induced by a moving magnetic pressure during launch of projectiles. When railgun armature velocity achieves critical velocity, resonance in railgun can occur and cause high amplitude stress and strain in armatures passage and causes life decreasing and damaging in rails. Critical velocity can be considered as one of the railgun dynamic design parameters. In this study, governing equations for rails under dynamic loading conditions has been investigated. Armature critical velocity according to design parameters has also been studied. The results show that dynamic response of the EM barrel becomes critical for increased projectile velocity and lightweight barrel designs. Also, the results of numerical simulation of the bore deformation are presented in this paper under applied loads. The algorithm is used to study the dynamics of tensile stresses near the electrode surface. Accordingly, the model that accounts for projectile velocity and gun construction can be used to guide and improve barrel design
Sponsorship	IEEE Magnetics Society
Starting Page	126
Ending Page	131
Page Count	6
File Size	379440
File Format	PDF
ISSN	00189464
Volume Number	43
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Railguns Projectiles Magnetic resonance Rails Electromagnetic modeling Electromagnetic launching Stress Magnetic field induced strain Equations Numerical simulation railgun Critical velocity dynamic response
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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