水下连续爆炸声学特性分析  

Analysis of acoustic characteristics of sequential underwater explosion

作　　者：裴善报[1,2] 刘荣忠[1] 郭锐[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]安徽工业大学机械工程学院,安徽马鞍山243000

出　　处：《南京理工大学学报》2015年第2期144-148,共5页Journal of Nanjing University of Science and Technology

基　　金：高等学校博士点基金(20133219110019)

摘　　要：为了分析水下连续爆炸的水声学特性,采用具有统一时间间隔的多个爆炸单元进行水下连续爆炸试验及测量。根据测试获得的声信号数据,分析了水下连续爆炸冲击波的衰减及传播特性,研究了声信号的声持续时间、声压级和声能量。研究表明,水下连续爆炸会产生很强的声功率,声持续时间为连续爆炸单元的爆炸时间间隔之和。声信号的频率范围宽,其能量主要集中分布在频率24 k Hz以下,在低频段能量更大。说明水下连续爆炸作为功率高、频带宽、声持续时间长的水声声源,在水声干扰方面具有重要作用。In order to study the underwater acoustic characteristics of the sequential underwater explosion, sequential underwater explosions with the interval time are tested and measured as the acoustic signal. According to the acoustic signal based on the obtained data, the attenuation and propagation characteristics of the shock wave of the sequential underwater explosion and the acoustic duration, sound pressure level and acoustic energy distribution of the signal are studied. Researches show that,the sequential underwater explosion can produce strong acoustic power, acoustic duration is the sum of interval time of the individual explosive unit, the signal frequency range is very wide, and the acoustic energy is mainly centralized in the frequency area under 24 kHz while the higher energy band is in the low frequency band. Results also show that the sequential underwater explosion is an acoustic source with the high power, the wide bandwidth and the long acoustic duration and it plays an important role in the underwater acoustic interference.

关 键 词：水下连续爆炸 声学特性 水声声源 能量分布 水声干扰 

分 类 号：O389[理学—流体力学] TB561[理学—力学]