SIMULATION OF NONLINEAR RAYLEIGH WAVES PROPAGATION IN CRACKED LAYERED ELASTIC MEDIUM
The nonlinear Rayleigh waves in layered half space with micro-cracks are analyzed by using finite element method.The micro-cracks close or open under the traction of Rayleigh waves.This leads that the second harmonic of Rayleigh waves can be observed after interacting with micro-cracks.For micro-cracks near the surface of structures,the second harmonics can be obtained from Rayleigh waves modes passing through micro-cracks.However,for micro-cracks in the low-velocity interlayer,the second harmonics can be obtained only when the Rayleigh waves modes at low frequency interact with micro-cracks.Besides,the level of the nonlinear effect is influenced by the length and width of micro-cracks.
Nonlinear Rayleigh waves Layered half space Finite element method Micro-cracks
Lu JIA Yan-shou GUO Juan HUANG Bi-xing ZHANG
State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100
国际会议
石家庄
英文
28-32
2019-11-01（万方平台首次上网日期，不代表论文的发表时间）