摘要
建立了半无限各向同性弹性固体的具有吸收边界的二维平面应变有限元模型,计算研究了入射平面脉冲超声纵波和横波在固体中横向圆柱形孔上的散射。计算结果以位移场波场快照和位移散度场(纵波)、位移旋度场(横波)波场快照的形式给出,与现有动态光弹实验照片进行了比较,符合得较好。通过对计算数据的处理,清晰地看到了入射纵波沿孔壁的螺旋旋转爬行,证实了理论预计,弥补了光弹实验结果的不足。
A two-dimensional plain strain finite element model of infinite isotropic solid has been developed to investigate the ultrasonic wave scattering by a cylindrical hole. The results, presented in the form of displacement snapshot, and divergence and curl snapshot, are compared with the previous observations obtained with the dynamic photoelasticity method. Good agreement is found By processing the data, screw creeping of the incident compression wave along the hole can clearly be seen, verifying a theoretical prediction and compensating for the deficiency of experimental results.
出处
《声学技术》
CSCD
北大核心
2007年第3期417-421,共5页
Technical Acoustics
关键词
固体
超声波
圆柱形孔
散射
有限单元法
solid
ultrasonic wave
cylindrical hole
scattering
finite element method
