Pekeris波导中近程声场数值算法  

Numerical solution of the acoustic field in Pekeris waveguide

作　　者：王德俊 惠俊英[1] 杨春[1] 蔡平[1] 

机构地区：[1]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2005年第3期344-348,共5页Journal of Harbin Engineering University

摘　　要：对Pekeris波导中近程声场进行了波动理论分析并设计了数值算法。重点分析声场的侧面波部分,并设计了解析解和数值解相结合的算法,大大提高了侧面波的计算精度.对于简正波,运用高效数值方法解频散方程,提高了简正波的计算精确和速度.海试结果与理论预报较为一致,证明了所讨论算法的正确性.理论与海试结果表明,侧面波在近距离及深海中等距离是不可忽略的.最后将声场波动模型与射线模型进行了对比,二者符合较好.讨论的方法在预报近程声场方面有特色.To help predict the sound field over a short distance, the short distance acoustic field in a Pekeris waveguide was analyzed by wave theory, and the numerical algorithms were designed. The lateral wave was analyzed, and a highly accurate algorithm was produced which compounded analytic solutions with numerical ones. To obtain accurate normal modes quickly, the frequency dispersion equation was solved by an efficient numerical algorithm. Sea trial results coincided with the theoretical predictions, proving the algorithms. The theoretical and sea trial results showed that the lateral wave can not be ignored in short or even middling distance in deep sea. Wave and ray models of the sound field were also compared and found to be in agreement.

关 键 词：侧面波 频散方程 声传播 

分 类 号：TB566[交通运输工程—水声工程]