Novel Study of the Rail’s Geometry in the Electromagnetic Launcher

Bayati, Mohammad Sajjad; Keshtkar, Asghar

doi:10.1109/tps.2015.2417532

Cited by 7 publications

(6 citation statements)

References 13 publications

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“…The current density distribution and magnetic flux density for different cases and their corresponding different dimensions sizes have been calculated by FEM. This investigation is done by Bayati and Keshtkar (2015).…”

Section: Applications Of Finite Element Methods In Electromagneticsmentioning

confidence: 99%

“…However, other forms of rails are under investigation to find the optimal rails considering the efficiency. The EM launcher constructions with circular rails are discussed in these papers (Fahrenthold et al 1989;Peterson 1993;Bayati and Keshtkar 2015). The second type is the coil gun EML system, which propels the projectile by an electromagnetic force caused by the electric current that energizes electromagnetic solenoid coils (Musolino and Rizzo 2011;Abdo et al 2017).…”

Section: Types Of Constructionsmentioning

confidence: 99%

“…Literatūros šaltiniuose aprašomi dvimačiai uždaviniai, apimantys impulsinės srovės pasiskirstymą elektromagnetinės svaidyklės bėgyje ir magnetinio lauko pasiskirstymą bėgyje ir aplink jį (Bayati & Keshtkar 2015). Plėtojant dvimačių uždavinių modelius, keičiant tyrimų objektus ir metodikas buvo plėtojami skaitiniai skaičiavimai, sviedinio sukeliamiems fizikiniams reiškiniams tirti.…”

Section: Elektromagnetinių Svaidyklių Tyrimams Taikomų Skaitinių Analunclassified

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Magnetomechanical study of open-bore two-rail electromagnetic launcher

Račkauskas¹

2018

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Section: Applications Of Finite Element Methods In Electromagneticsmentioning

confidence: 99%

Section: Types Of Constructionsmentioning

confidence: 99%

Section: Elektromagnetinių Svaidyklių Tyrimams Taikomų Skaitinių Analunclassified

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Magnetomechanical study of open-bore two-rail electromagnetic launcher

Račkauskas¹

2018

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“…ing the armature effect [5][6][7][8][9]. Researchers also used 3D analysis using analytical methods such as finite element method (FEM) and finite difference method (FDM) by considering the armature effect, and the armature was assumed to be stationary [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for Dynamic Analysis of an Electromagnetic Rail Launcher using FEM Coupled with Simplorer

Lydia¹,

Karpagam²,

Murugan

2022

ACES Journal

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The performance of a rail gun depends on the current density distribution over the rail and armature as it determines the force that accelerates the projectile of the rail gun. A finite element method (FEM) coupled with Simplorer was developed to model and study the performance of the rail gun. The rail gun was modeled using an ANSYS eddy current field solver to determine the current density distribution and equivalent rail gun circuit for the given rail gun geometry. The armature velocity was then calculated using Simplorer by coupling the obtained equivalent rail gun circuit and exciting the rails using a capacitor-based pulsed power supply (PPS) system. The FEM coupled with Simplorer method was verified by numerical calculations for the rectangular rails and also with other researchers’ value, and that showed a good agreement between the results. Further, the current density distribution over rails and armature and velocity of the armature was calculated for different rail cross sections such as circular concave, circular convex, rectangular concave, rectangular convex, T-shaped concave, and T-shaped convex with a C-shaped armature. It was observed that the circular convex rail gun with C-shaped armature showed minimum current density distribution and gives a higher value of armature velocity compared with other rail gun structures. Thus, the circular convex armature was found to be suitable for the electromagnetic (EM) rail gun launchingsystem.

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“…To reduce this effect, the small change in the input current has to be maintained as small as possible [12]. For the various geometries of rail cross sections like rectangular, circular, or along with concave and convex models, the L' and J values were calculated and compared with the results obtained [13]- [16]. In this paper T shape convex and concave shape rail cross section is proposed and rail gun key design parameters are calculated by varying its dimensions using Ansoft Maxwell 2-D eddy current solver which uses finite element analysis technique to calculate these parameters.…”

Section: Introductionmentioning

confidence: 99%

Inductance gradient and current density distribution for T-shaped convex and concave rail cross-sections

Kumar

Murugan

Shivkumar

2018

IJET

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Rectangular rail was the most widely used cross section shape for the rail gun electromagnetic launching (EML) system. Based on sector assimilation, the rail gun key parameter especially current density (J) and inductance gradient (L’) greatly affected. J decides the efficiency of EML and L’ decides the force acting on the projectile of EML. So, it is mandatory to look upon the sector assimilation of rails. In this paper T shape convex and concave shape rail cross section is proposed and rail gun key design parameters are calculated by varying its dimensions using Ansoft Maxwell 2-D eddy current solver which uses finite element analysis technique to calculate these parameters. The performance of rail gun discussed using the obtained values and it has been observed and that the compared with other considered rail geometries, the T-shaped concave model shows more impact on inductance value which causes uniform current density distribution over the rails.

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Novel Study of the Rail’s Geometry in the Electromagnetic Launcher

Cited by 7 publications

References 13 publications

Magnetomechanical study of open-bore two-rail electromagnetic launcher

Magnetomechanical study of open-bore two-rail electromagnetic launcher

A Novel Technique for Dynamic Analysis of an Electromagnetic Rail Launcher using FEM Coupled with Simplorer

Inductance gradient and current density distribution for T-shaped convex and concave rail cross-sections

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