【作者】 王春涛； 马树青； 孟洲； 胡鹏涛；

【Author】 WANG Chun-tao;MA Shu-qing;MENG Zhou;School of Meteorology & Oceanography,National University of Defense Technology;Unit 91388,PLA;

【机构】 国防科学技术大学气象海洋学院； 91388部队；

【摘要】 在水下声场中,对声强度矢量特性的研究是矢量声学中的重要内容,声强度矢量具有散度、旋度等典型矢量特征。文章首先推导了单声源激发的声强度矢量的旋度与振速相位差的关系式,利用KRAKENC模型,在考虑弹性海底情况下对旋度的特征进行了统计分析,之后利用海上试验数据进行了分析验证。研究结果表明:声强的旋度各方向分量与x,y,z通道振速相位差正弦值呈正比,在远场情况下,声强度矢量在水平方向上旋度为零,而在垂直方向上存在涡旋。更多还原

【Abstract】 In the underwater acoustic field,acoustic intensity vector is the key to the vector acoustic.The research on the vortex of the acoustic intensity vector is of great significance.This paper derives the relationship between the vortex of the acoustic intensity vector and the velocity phase difference,analyses the vortex statistical characteristics by using the KRAKENC model,and verifys the analysis by the sea experiment’s data.The results show that the directional components of the acoustic intensity vector are positively proportional to the velocity phase differences of x,y and z axises,and the vortex of the acoustic intensity vector is zero in the horizon direction,while is not zero in the vertical direction.The discovered vortex structures are of interest both for physical acoustics and for applied problems in underwater acoustics.更多还原