As the inner wall pressure increases during gun shooting, the fatigue life of a gun barrel is reduced. This article proposed a method based on magnetically confined plasma theory to increase the fatigue life of a gun barrel. The core idea was to reduce the pressure on the inner wall of the gun barrel by restraining the movement of plasma inside it via the solenoid magnetic field. As a result, its fatigue life improved. The confinement mechanism of the solenoid magnetic field on plasma was first analyzed. The influence of different magnetic field strengths on plasma was studied through simulation modeling. The law of magnetically confined plasma in the gun barrel was obtained. Second, the inner wall pressure was tested after a solenoid magnetic field was added to the gun barrel. The effectiveness of the proposed method in reducing pressure on the inner wall of the gun barrel was verified. The electromagnetic interference introduced by high-power electrical appliances and solenoid magnetic field in the test was effectively reduced by adopting multistage electromagnetic shielding protection. A Manson–Coffin model was also used to evaluate the fatigue life of the gun barrel, and the results verified the feasibility of the proposed method for improving its fatigue life.

中文翻译：

---

磁约束等离子体对枪管疲劳寿命的影响

随着枪炮射击时内壁压力的增加，枪管的疲劳寿命降低。本文提出了一种基于磁约束等离子体理论的提高炮管疲劳寿命的方法。核心思想是通过螺线管磁场限制等离子体在枪管内壁的运动来降低枪管内壁上的压力。结果，其疲劳寿命得到改善。首先分析了螺线管磁场对等离子体的约束机制。通过模拟建模研究了不同磁场强度对等离子体的影响。得到了枪管内磁约束等离子体定律。其次，在向枪管添加螺线管磁场后测试内壁压力。验证了该方法在降低炮管内壁压力方面的有效性。采用多级电磁屏蔽保护，有效降低试验中大功率电器和螺线管磁场引入的电磁干扰。Manson-Coffin模型也被用于评估枪管的疲劳寿命，结果验证了所提出的提高其疲劳寿命方法的可行性。