地震工程与工程振动（英文版）
地震工程與工程振動（英文版）
지진공정여공정진동（영문판）
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
2004年
2期
299-305
,共7页
sound-structure interaction%crack%scattering%radiation%BEM%FEM
Evaluation of the sound-structure interaction is important for effective control of noise and vibration in structural acoustic systems. Cracked elastic structure-sound interaction problems are studied by employing the hybrid fractal FEM and BEM. The degrees of freedom of the system can be reduced greatly through adopting fractal FEM in discretizing the cracked elastic structure; while the exterior acoustic field is calculated by BEM, which automatically satisfies Sommerfeld's radiation condition. Numerical examples are given and show that the resonant frequencies of the structure-acoustic coupled system decrease as the depth of the crack increases, and that the crack has a significant effect on the acoustical field in the vicinity of the crack tip.
