CAJ | 학술논문

将舰船地震波简化为液固半无限空间低频点声源引起的地震波动,基于简正波理论,通过计算围道内的留数得到了位移势函数的表达式.分析了液体层内声传播损失和固体层表面的位移、加速度的频率特性曲线,为分析舰船地震波的形成机理以及波动特征提供了一定的理论基础.
장함선지진파간화위액고반무한공간저빈점성원인기적지진파동,기우간정파이론,통과계산위도내적류수득도료위이세함수적표체식.분석료액체층내성전파손실화고체층표면적위이、가속도적빈솔특성곡선,위분석함선지진파적형성궤리이급파동특정제공료일정적이론기출.
The elastic wave in seabed excited by low frequency noise of sailing vessel is so-called ship seismic wave that can be used to identify ship target. The ship seismic wave is simplified to the seismic wave generated by a low frequency point sound source in a liquid-solid layered hemisphere. Based on the normal mode theory, the expressions of displacement potential functions are obtained by evaluating the residue round a contour. With these functions, the variation of propagation loss of sound press with distance in liquid layer is analyzed. The characteristic of displacement and acceleration on the solid layer surface varying with frequency are also discussed.