Interior Ballistic Characteristics of Electromagnetic Rail Launcher Considering the Dynamic Characteristics of Real Launcher

Liu, Junyong; Li, Xiangping; Feng, Junhong; Li, Kai

doi:10.1109/tie.2020.2992957

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…At the moment of peak current, the maximum magnetic induction intensity is 43.9 T, the EM thrust in the forward direction of the armature is 1.088 MN, and the armature-rail contact force is 0.736 MN. Since the EM force is approximately proportional to the square of the current, the EM force at any moment can be obtained according to Equation (1).…”

Section: Calculation Of Transient Em Forcementioning

confidence: 99%

“…Electromagnetic rail launcher (EMRL) is a kind of linear accelerator using Lorentz force to accelerate the projectile up to ultra-high speed. During the launching process, the insulator will be subjected to the contact-impact of the launch packet and the compression of the time-varying load of the rail, which is prone to delamination damage and affects the life of the insulator [1][2][3]. Therefore, it is of great significance to study the delamination failure mechanism of the insulator during launch.…”

Section: Introductionmentioning

confidence: 99%

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Delamination failure analysis of G10 insulator in electromagnetic rail launcher

Liu

Tan

et al. 2023

High Voltage

Self Cite

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The electromagnetic (EM) rail launcher G10 insulator is prone to delamination damage during launch, which affects the service life of the insulator. Through the secondary development of ABAQUS® commercial finite‐element software, an EM‐structure coupling launch dynamics model considering projectile‐barrel coupling is established. The simulation indicates that the transverse swing of the projectile changes in a sine‐like law, and the time of the upper half wave corresponds to the pulse width of the impact force pulse waveform. The stress concentration occurs on the inner surface of the insulator where the contact‐impact occurs, resulting in impact damage. The midline of the insulator inner surface bears a large compressive strain under the action of pre‐tightening force, and the insulator is compressed oscillatingly under the influence of the time‐varying load of the rail during launch. Under the condition of repeated launch, the launch package repeatedly impacts the insulator, and the alternating load of the rail is cyclically loaded on the insulator with impact damage, which will cause the compression fatigue of the insulator and the expansion of impact damage crack. They are the main reasons for the delamination failure of insulator, and the experimental analysis is carried out. This study provides a method to study the delamination failure mechanism of the insulator, and provides guidance for improving the life of the insulator.

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Section: Calculation Of Transient Em Forcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Delamination failure analysis of G10 insulator in electromagnetic rail launcher

Liu

Tan

et al. 2023

High Voltage

Self Cite

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“…Owing to good development prospects and technical advantages, it is an important research direction in the field of electromagnetic launch. An electromagnetic track launcher can increase the armature to a high speed within tens of milliseconds, which leads to a relatively complex experimental environment, and the research is relatively dependent on numerical simulation calculation [4][5][6][7]. Therefore, in order to achieve further popularization and application, how to improve the calculated accuracy of the simulation model and achieve full true simulation calculation is the key issue to be solved at present.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Verification of Electromagnetic-Thermal Coupling for Electromagnetic Track Launch Considering the Dynamic Conductivity

Yan,

Jiang,

Yang

et al. 2023

Applied Sciences

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In order to solve the problems of insufficient precision of the armature velocity and inductance gradient in the process of finite element calculation of the electromagnetic track launcher, an improved dynamic conductivity electromagnetic-thermal coupling model is proposed to make the calculated results closer to the actual working condition. Firstly, the finite element analysis for the electromagnetic-thermal field is carried out. Then, considering the influence of dynamic conductivity on the armature velocity and inductance gradient, an improved dynamic conductivity electromagnetic-thermal coupling model based on finite element analysis is established, whose parameters are identified by the proposed PSO-GA hybrid algorithm. Moreover, the predicted values of armature velocity and inductance gradient are also obtained. Finally, the experimental platform of the electromagnetic track launcher is built to verify the improved model. By comparing the predicted value of the improved model with the experimental test value, it is found that the improved model can further reduce the calculated error from 5.79% to 1.18%, which provides a certain theoretical basis for the full true simulation of the electromagnetic track launch.

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Model Predictive Control for Electromagnetic Launcher of UAV

Xie

Zhang

et al. 2022

Lecture Notes in Electrical Engineering

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Interior Ballistic Characteristics of Electromagnetic Rail Launcher Considering the Dynamic Characteristics of Real Launcher

Cited by 9 publications

References 25 publications

Delamination failure analysis of G10 insulator in electromagnetic rail launcher

Delamination failure analysis of G10 insulator in electromagnetic rail launcher

Modeling and Verification of Electromagnetic-Thermal Coupling for Electromagnetic Track Launch Considering the Dynamic Conductivity

Model Predictive Control for Electromagnetic Launcher of UAV

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