Analyze Acoustic Characteristic And Use Effect Of Bubble-shell

In modern naval warfare, to win a local naval warfare under high-tech conditions,need large combat radius,powerful striking forcet and advanced communication technique. Except that,hard defense is another necessary qualifications. Along with the science technical progressing,the development of underwater acoustic counter-technology is highly regarded by every country in the worldModern underwater acoustic devices have been primary equipment which be used for underwater acoustic detection. navigation and communication. The one who want to win a sea battle,has to take the initiative in the underwater acoustic counterwork. That is to say,has the ability to disturb the enemy's underwater acoustic devices with underwater acoustic counter devices,and also has the ability to guarantee our underwater acoustic devices working under the disturbing of the enemy. The passive disturbing leads a very important effect in this situation. And the bubble-shell is a very good choice to produce a passive disturbing.This thesis based on the classic theories and the results of recently research,analyse and conclude acoustic characteristics of bubble-shell,that is acoustic characteristics of underwater air bubble,especially the acoustic scattering and acoustic transmission of bubble screen. Based on the data of SongHua Lake experiment,analyse the bubble-shell's acoustic scattering intensity and insertion loss,the connection of the sound wave frequency,the sound wave irradiation area and the density of bubble screen. Based on the theories and the result of the data processing,build a acoustic scattering intensity and insertion loss predicting model of single or multi bubble-shell. At last,analyse the acoustic counterwork model from the point of energy,and conclude the tactics of bubble-shell's application.