Structural response of a railgun accelerator

Author

Shvetsov, G.A. ; Ermolenko, V.M. ; Kurguzov, V.D. ; Ivanov, G.V. ; Anisimov, S.A.

Author_Institution

Lavrentyev Inst. of Hydrodynamics, Acad. of Sci., Novosibirsk, Russia

Volume

31

Issue

1

fYear

1995

Firstpage

657

Lastpage

660

Abstract

The results of numerical simulation of the bore deformation and barrel dynamics are presented in the paper. The two-dimensional problem of the stress-strained state and dynamics of a multi-layer cylinder under the action of moving load is solved. The algorithm developed is applicable to the problem of the dynamics of the barrels of any cross section. The algorithm is also used to study the dynamics of tensile stresses near the electrode surface. A hypothesis is proposed that the dynamics of the barrel and tensile stresses may be among the reasons for the melt "shaking-off" inside the bore which may result in secondary breakdown. If this effect takes place, it may be one of the fundamental physical factors limiting the kinematic characteristics of railguns.<>

Keywords

deformation; electrodes; numerical analysis; railguns; stress analysis; stress-strain relations; structural engineering; algorithm; barrel dynamics; bore deformation; cross section; electrode surface; kinematic characteristics; multi-layer cylinder dynamics; numerical simulation; railgun accelerator; secondary breakdown; stress-strained state; structural response; tensile stresses; Acceleration; Boring; Electrodes; Plasma accelerators; Plasma materials processing; Plasma properties; Projectiles; Railguns; Rails; Tensile stress;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.364616

Filename

364616