低频大功率发射换能器的要求及限制-声学技术.PDF

栾桂冬　张金铎　　　　　　朱厚卿 ( 100871) ( 100080) , , , , Needs and limiti ng f actors for high-power low-f requency proj ectors LUAN Guidong ZHANG Jin duo ( Departement of electr onic , Peking univ er it y, Beij ing 100871) ZH U Houqing ( , , 100080) In titute of A cou tic A cademia Sinica Beijing AbstractT he adv ance in the acou tic quieting of ubm arine w ill nece it ate the u e of activ e onar a , - , - on adjunct a a mean of dedecting ubmar ine br ing about a deep r e earch in high power low fr equency projector . T he need and limiting fact or for high-pow er , low fr equency ar e di cu ed and different ty pe projector of high-pow er and low -fr equency ar e compared. , - , - Key words pr ojector low fr equency high pow er 1　引　言 , , , , 2　低频大功率发射换能器的要 求和限制 , [ 1] , : = 20 + 0 10- 3 TL lgr r , 20lgr , r ; , 0 , ( dB/ km) , 1 , , 6dB , 100km : , 1938 1 , : 99-3-12, : 99-4-16 54 18 2 ( 1999) 2 , cka u0 - 1 1 1kHz A = 1+ ( k a) 2 , = tg ( ka) ,