节点文献

水平缓变声道中的WKBZ绝热简正波理论

WKBZ adiabatic mode approach to sound propagation in gradually range-dependent channels

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具，请取消加速工具后下载。

【作者】 张仁和； 刘红； 何怡；

【Author】 ZHANG Renhe; LIU Hong and HE Yi (State Key Laboratory of Acoustics, Institul of Acoustics, Acadamia Sinica Beijing 100080)V. A. Akulichev (Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690600, Russia)

【机构】 中国科学院声学研究所声场声信息国家重点实验室；

【摘要】 本文利用具有海面相移修正的本征函数的ＷＫＢＺ近似，并同时考虑波导简正波和海底反射简正波的贡献，提出了适合于水平缓变水下声道的ＷＫＢＺ绝热简正波理论。数值结果表明，会聚区声场主要由波导简正波决定，而影区声场主要由海底反射简正波决定。在菲律宾海中，频率范围在１０９ＨＺ至８６０ＨＺ，距离至２５０ｋｍ范围时，用ＷＫＢＺ绝热简正波理论计算的结果与实验数据符合得很好。

【Abstract】 By use of the WKBZ approximations of eigenfunctions with a surface phase-shift correction, and taking account of both the waveguide and bottom-reflection modes, a WKBZ adiabatic mode approach suitable for gradually range-dependent channels is proposed. Numerical simulations show that the acoustic fields in convergence zones are mainly determined by waveguide modes while for deep shadow zones bottom--reflection modes must be taken into account. This approach is applied to the environment in the Phillipine Sea, and the calculated results for frequencies from 109 to 860 Hi and ranges up to 250 km are in good agreement with the measured data.

【关键词】