CAJ | 학술논문

　　三层有源隔声结构中次级平面声源的布放影响系统的隔声性能，平面声源位置的优化需重点研究。应用遗传算法在宽频带内对三层结构中平面声源的位置进行优化设计。首先对三层板腔结构建模并求解振动响应，然后分别以被动隔声、有源降噪及系统总隔声性能为依据，构建宽频带优化函数；最后通过迭代计算获得最优的布放位置。结果表明，对于被动隔声最优的平面声源布放位置应位于双层结构的中间；而对有源降噪，次级声源应尽量靠近入射板布放。对于系统总的隔声性能，最优的布放位置应在上述两者之间取折中。
　　삼층유원격성결구중차급평면성원적포방영향계통적격성성능，평면성원위치적우화수중점연구。응용유전산법재관빈대내대삼층결구중평면성원적위치진행우화설계。수선대삼층판강결구건모병구해진동향응，연후분별이피동격성、유원강조급계통총격성성능위의거，구건관빈대우화함수；최후통과질대계산획득최우적포방위치。결과표명，대우피동격성최우적평면성원포방위치응위우쌍층결구적중간；이대유원강조，차급성원응진량고근입사판포방。대우계통총적격성성능，최우적포방위치응재상술량자지간취절중。
The location of the secondary planar source of an active three -panel sound insulation structure affects its sound insulation performance .We use the genetic algorithm to optimize the location of the secondary planar sound source in a wide frequency band .First, we establish the model of the three -panel sound insulation structure by u -sing the vibro-acoustic coupling method and solve its vibration response .Second, based on the passive sound insu-lation, active noise reduction and total sound insulation performance of the sound insulation structure , we establish the wide frequency band optimization function .Finally, we obtain the optimal locations of the secondary planar sound source with the iterative calculation of the genetic algorithm .The simulation results, given in Figs.2 through 9, and their analysis show preliminarily that : (1) for the best passive sound insulation performance , the optimal location of the secondary planar sound source should lie in the middle of the double -panel sound insulation struc-ture; (2) for the active noise reduction, the secondary planar sound source should be located as close to the inci -dent panel as possible; (3) for the total sound insulation performance that considers both active and passive sound insulation performance, the optimal location should be a compromise between the abovementioned two optimal loca -tions.