摘要
火炮特别是新型火炮在现代战争中发挥巨大作用,身管是火炮的重要组成部分,其缺陷检测至关重要。利用Comsol有限元仿真软件模拟导波模态并与理论计算结果进行对比,验证有限元仿真的正确性和可行性。在对比研究L模态导波和T模态导波的基础上,给出一种基于L(0,2)模态导波的身管缺陷无损检测方法,并利用有限元仿真软件对L(0,2)模态在存在内表面非对称缺陷的身管中的传播过程进行仿真。理论研究和仿真结果表明,该方法可以用来识别不同种导波模态并对缺陷进行检测,为今后身管缺陷检测奠定基础。
Guns, especially new type guns play an important role in modern warfare. As an important part of gun, the barrels＇ damage detection is of great significance. This paper simulates ultrasonic guided waves by using finite element software—Comsol and compares the simulative result with theoretical calculation to prove the feasibility of the software. After studying and comparing the characteristics of L mode and T mode of ultrasonic guided waves, this paper puts forward a nondestructive detection method based on L（0,2） mode guided wave. The L（0,2） mode guided wave propagation characteristics are simulated when asymmetric defects exist on the inner surface of gun barrel. The research and simulation results indicate that this method can be used to recognize guided wave mode and detect defects. It is hoped that this paper can provide some instructions to future researches on barrel detection.
出处
《声学技术》
CSCD
北大核心
2015年第5期407-412,共6页
Technical Acoustics
基金
国家自然基金资助项目(11274199)
关键词
超声导波
缺陷
身管
纵向模态
传播特性
ultrasonic guided wave
defect
gun barrel
longitudinal mode
propagation characteristics
