Abstract
The main objective of the research is to investigate, how the power supply parameters influence the kinetic energy of the movable element, called commonly a projectile or bullet. A calculation and measurement results of transient characteristics for an electrodynamic accelerator with permanent magnet support were presented in the paper. The calculations were made with using field-circuit model, which includes the parameters of the power supply, mass of the bullet and friction phenomenon. Characteristics of energy and muzzle velocity verso supply voltage (50 V to 350 V) and capacitance value (60 mF to 340.5 mF) were determined, as well. A measurement verification of selected points of calculation characteristics were carried out for investigated values of muzzle velocity. A good conformity between calculation and measurement results was obtained. Concluding, presented characteristics of the muzzle velocity and energy of the projectile vs. power supply parameters indicate, that accelerators could be used for fatigue testing of materials.
Highlights
Electrodynamic accelerators (EA), commonly called railguns, are investigated for many years [1, 2]. These researches were dedicated to military applications [3,4,5]
The use of accelerators for fatigue testing of materials has many advantages: wide measuring range, high velocity impact tests and the possibility of using a ballistic part with different face geometry. These advantages allow to use accelerators in the material testing in industry, in military and especially in the area related with exploration of the space [9]
The main aim of this study is the prediction of the projectile energy with using the presented calculation model
Summary
Electrodynamic accelerators (EA), commonly called railguns, are investigated for many years [1, 2]. The use of accelerators for fatigue testing of materials has many advantages: wide measuring range, high velocity impact tests and the possibility of using a ballistic part with different face geometry. These advantages allow to use accelerators in the material testing in industry, in military and especially in the area related with exploration of the space [9]. The prediction of the projectile energy, based on the parameters of the power supply system, mass and geometry of the projectile face, is very important. This can be achieved by appropriately formulated computational model of the accelerator. The main aim of this study is the prediction of the projectile energy with using the presented calculation model
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