Finite element analysis method for metal cylinder electromagnetic field in close-wound solenoid

Abstract

The invention discloses a finite element analysis method for a metal cylinder electromagnetic field in a close-wound solenoid, which comprises the following steps: S1, pretreatment: defining a geometric area of a problem, enabling plasma in a barrel to form a magnetized plasma sheath layer on the surface of an inner bore under the action of a magnetic field and generate three effects, S2, final assembly solving, and S3, post-treatment. The analysis method disclosed by the invention is more scientific and reasonable. According to the analysis method, the nonuniform radial distribution of the alternating magnetic field in the long straight solenoid can be intuitively obtained. The influence of the changed angular frequency is avoided. The magnetic field of the central part is larger than theedge part under the influence of the alternating magnetic field in the absence of the conductor, and on the contrary, when the conductor exists, the magnetic field of the central part is smaller thanthe edge part, and when the frequency is small, the influence of the two situations tends to zero, and the situation that the magnetic field is changed into a constant value along with time can be seen.

Description

technical field [0001] The invention relates to the field of electromagnetic fields, in particular to a finite element analysis method for the electromagnetic field of a metal cylinder in a densely wound solenoid. Background technique [0002] In the field of electromagnetism, there have been relevant theoretical derivations and numerical calculations for infinitely long, current-carrying round wires and densely wound finite-length solenoids, but most of the research on the solenoid magnetic field focuses on the constant magnetic field, while on the alternating There are few studies on the magnetic field, and most of them are theoretically analyzed and calculated. Through theoretical research, the project team established a mathematical model of the alternating magnetic field of the solenoid, discussed the electromagnetic induction characteristics in the bore, and established a finite element simulation model based on Ansys Maxwell software. Corresponding simulation research...

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Problems solved by technology

[0002] In the field of electromagnetism, there have been relevant theoretical derivations and numerical calculations for infinitely long, current-carrying round wires and densely wound finite-length solenoids, but most of the research on the solenoid magnetic field focuses on the constant magnetic field, while on the alternating There are few studies on the magnetic field, and most of them are theoretically analyzed and calculated. Through theoretical research, the project team established a mathematical model of the solenoid alternating magnetic field, discussed the electromagnetic induction characteristics in the bore, and established a finite element simulation model based on Ansys Maxwell software. Corresponding simulation research; since the magnetic permeability of steel material is much larger than that of air, when there is a metal conductor in the magnetic field, most of the magnetic field lines pass through the metal conductor, resulting in uneven distribution of the magnetic field space under static field conditions; Tube magnetic field coupling has a wide range of applications in many fields. The electromagnetic field applied to the inside of the barrel can not only transfer energy and improve the effectiveness of the barrel launching projectiles, but also transmit information and improve the detectability of the barrel. Finite element analysis is the use of mathematics Approximate methods for simulating real physical systems

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