탄성매질을 고려한 천해 음선기반 시간영역 광대역 신호 모델링 기법에 관한 연구

Abstract

This paper proposes a ray-based forward modeling scheme which is suitable for the simulations of acoustic wave propagation in shallow water with elastic bottom. The proposed model comprises of ray tracings both of compressional and shear waves . considerations of elastic wave reflection/transmission coefficients, and calculations of the phases and the amplitudes of eigen rays. The main characteristic of the scheme is fast simulation time due to direct calculation of the broad-band time signals in the time-domain, i.e. without transformation of the frequency-domain solutions to the time signals. Finally, we applied the model to 2-types of test environments and compared the resulting signals with those of ORCA in order to validate the proposed model.