文档介绍：振 动 与 冲 击
第 41 卷第 13 期 JOUＲNAL OF VIBＲATION AND SHOCK Vol． 41 No． 13 ，
the elastic guided wave method to detect damages of such structures it is necessary to deeply understand effects of
，
stiffeners on propagation behavior of elastic guided wave in thin-walled structures． Here aiming at typical T-stiffened wall
，
panel structure in aircraft structure the interaction mechanism between ultrasonic guided wave and T-stiffener was studied
using the numerical simulation method． Variation characteristics of wave propagation behavior caused by presence of
， ，
stiffener were analyzed in time domain frequency one and wave number one respectively． The results showed that
�
existence of stiffener can cause obvious mode conversion phenomenon of propagating wave in structure with change of
，
excitation frequency reflection and transmission behaviors of S0 and A0 mode guided waves change obviously．
�