Experimental and numerical investigations of vibrations at a railgun with discrete supports

Schuppler, Christian; Tumonis, Liudas; Kačianauskas, Rimantas; Schneider, M.

doi:10.1109/eml.2012.6325050

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…An interferometric measurement technique was applied in [5]. Preliminary experimental investigations using the EMA3 launcher confirmed the numerical approaches taken so far [6].…”

Section: Introductionmentioning

confidence: 53%

Structural mechanics of railguns with open barrels and elastic supports: The influence of multishot operation

Stonkus

Račkauskas

Schneider

et al. 2014

2014 17th International Symposium on Electromagnetic Launch Technology

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The dynamic behavior of the railgun housing including the rails is of great importance for the system performance. The transient loading (magnetic pressure) may have a negative influence on the sliding electrical contact required for this acceleration technology. Therefore, the analysis of the displacement of the inner rail surfaces due to elastic waves is of great importance.The French-German Research Institute of Saint Louis is operating several railguns with housings characterized by an open barrel design allowing for innovative diagnostic techniques. The repelling forces between the rails are countered using discrete steel bolts. The rails are mounted to bars made from composite material. In the past, we presented experimental and numerical findings concerning the dynamic behavior of such railguns in single shot mode. In this work we present for the first time 3D Finite Element calculations concerning the dynamical behavior of the ISL rapid fire railgun RAFIRA operating in multishot mode. Multishot scenarios with fire rates of 50 Hz are considered and particular attention is paid to the question if the dynamical behavior of the railgun is influenced by preceding shots.

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“…An interferometric measurement technique was applied in [5]. Preliminary experimental investigations using the EMA3 launcher confirmed the numerical approaches taken so far [6].…”

Section: Introductionmentioning

confidence: 53%

Structural mechanics of railguns with open barrels and elastic supports: The influence of multishot operation

Stonkus

Račkauskas

Schneider

et al. 2014

2014 17th International Symposium on Electromagnetic Launch Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…An interferometric measurement technique was applied in [7]. Preliminary experimental investigations using the EMA3 launcher confirmed the numerical approaches taken so far [8].…”

mentioning

confidence: 53%

“…where L is the inductance gradient of RAFIRA railgun (=0,44 µH/m), w = 25 mm is the width of the rails, and h = 25 mm is the rail separation [8]. Note that, (1) is an approximation as it is assumed that the J × B volume forces act only at the inner surface of the rails-which corresponds to a pronounced skin effect.…”

Section: B Load Of Railgunmentioning

confidence: 99%

Structural Mechanics of Railguns With Open Barrels and Elastic Supports: The Influence of Multishot Operation

Stonkus

Račkauskas

Schneider

et al. 2015

IEEE Trans. Plasma Sci.

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The dynamic behavior of the railgun housing including the rails is of great importance for the system performance. The transient loading (magnetic pressure) may have a negative influence on the sliding electrical contact required for this acceleration technology. Therefore, the analysis of the displacement of the inner rail surfaces due to elastic waves is of great importance. The French-German Research Institute of Saint Louis (ISL) is operating several railguns with housings characterized by an open barrel design allowing for innovative diagnostic techniques. The repelling forces between the rails are countered using discrete steel bolts. The rails are mounted to bars made from composite material. In the past, we presented the experimental and numerical findings concerning the dynamic behavior of such railguns in single shot mode. In this paper, we present for the first time 3-D finite element calculations concerning the dynamical behavior of the ISL RApid FIre RAilgun operating in multishot mode. Multishot scenarios with fire rates of 50 Hz are considered and particular attention is paid to the question if the dynamical behavior of the railgun is influenced by preceding shots. IndexTerms-3-D model, finite-element method, multishot, open barrel, railgun, transient dynamics.

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“…To calculate the magnetic force into mechanical construction rail in literature mostly usable method to calculate the current caring conductor produce the magnetic pressure which is proportional to the electric current flowing in the current caring conductor (Schuppler et al 2013a).…”

Section: Finite Element Methods In Mechanicsmentioning

confidence: 99%

Magnetomechanical study of open-bore two-rail electromagnetic launcher

Račkauskas¹

2018

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Experimental and numerical investigations of vibrations at a railgun with discrete supports

Cited by 5 publications

References 7 publications

Structural mechanics of railguns with open barrels and elastic supports: The influence of multishot operation

Structural mechanics of railguns with open barrels and elastic supports: The influence of multishot operation

Structural Mechanics of Railguns With Open Barrels and Elastic Supports: The Influence of Multishot Operation

Magnetomechanical study of open-bore two-rail electromagnetic launcher

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