海底爆破辐射声场的理论及数值研究  

Theoretical and numerical investigations of the acoustic field excited by submarine explosion

作　　者：汤立国[1] 许肖梅[1] 刘胜兴[1] 

机构地区：[1]厦门大学海洋学系

出　　处：《物理学报》2008年第7期4251-4257,共7页Acta Physica Sinica

基　　金：福建省自然科学基金(批准号:T0750014);中国科学院“声场声信息国家重点实验室”开放基金(2006)资助的课题~~

摘　　要：对固体基底浅海中声波传播的色散特性作了数值模拟与分析.利用液体及固体中声传播理论导出了固体基底内爆破源在浅海中所激发声场的解析解,在此基础上,通过数值计算,得出了浅海中不同空间点处的瞬态声压时域波形,并在瞬态声压时域波形的平滑伪Wigner-Ville分布基础上,对固体基底内爆破源在浅海中所激发瞬态声场的特性作了详细分析.This paper simulates and analyzes numerically the dispersion characteristics of the waves propagating in the shallow-ocean overlying a semi-infinite elastic solid. The analytical solution of the acoustic field in the shallow-ocean, excited by an explosive point source in the solid bottom, is derived by using the theories for sound propagation in liquid and solid. The time-domain waveforms of transient acoustic field are simulated with the above analytical solution. The dispersion characteristics of the transient acoustic field are analyzed by using the smoothed pseudo Wigner-Ville distribution.

关 键 词：海底爆破 声场 色散 瞬态声压 

分 类 号：O427.1[理学—声学]