Metamaterial-based Broadband Elastic Wave Collimator
According to an embodiment of the present invention, a seismic collimator includes: an object in which at least one unit cell is periodically formed; a first dynamic frequency curve obtained by incident on a unit lattice which satisfies an effective material property condition in a low frequency ban...
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng ; kor |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | According to an embodiment of the present invention, a seismic collimator includes: an object in which at least one unit cell is periodically formed; a first dynamic frequency curve obtained by incident on a unit lattice which satisfies an effective material property condition in a low frequency band; and a second dynamic frequency curve obtained when a seismic wave is incident on the unit lattice which satisfies the effective material property condition in a high frequency band. The effective material property condition is obtained according to an analysis of an elastic equation of the object, and the seismic wave incident into the object is collimated in a predetermined direction.
본 발명의 일 실시예에 따른 탄성파 시준 장치는, 적어도 하나의 단위 격자가 주기적으로 형성되는 물체와, 저주파 대역에서 유효 재료 물성 조건을 만족시키는 상기 단위 격자에 탄성파가 입사되어 획득된 제 1 동주파수 곡선 및 고주파 대역에서 상기 유효 재료 물성 조건을 만족시키는 상기 단위 격자에 탄성파가 입사되어 획득된 제 2 동주파수 곡선을 포함하고, 상기 유효 재료 물성 조건은 상기 물체의 탄성방정식 해석에 따라 획득되고, 상기 물체 내로 입사된 탄성파는 일정 방향으로 시준되는 것을 특징으로 한다. |
|---|