CAJ | 학술논문

针对圆柱型空腔吸声覆盖层，利用有限元软件建立了静压下平面波垂直入射的二维轴对称模型，并与遗传算法相结合，提出了静压条件下圆柱型空腔吸声覆盖层的优化设计方法；通过对吸声覆盖层的空腔结构和材料参数进行优化，结果表明：相较常压下的优化，静压下的优化设计使得吸声覆盖层圆柱型空腔结构变小，在高静水压力下的吸声系数提高；静压下的优化能根据吸声频段需求设计不同性能的吸声覆盖层。
침대원주형공강흡성복개층，이용유한원연건건립료정압하평면파수직입사적이유축대칭모형，병여유전산법상결합，제출료정압조건하원주형공강흡성복개층적우화설계방법；통과대흡성복개층적공강결구화재료삼수진행우화，결과표명：상교상압하적우화，정압하적우화설계사득흡성복개층원주형공강결구변소，재고정수압력하적흡성계수제고；정압하적우화능근거흡성빈단수구설계불동성능적흡성복개층。
The plane wave normally impinging on the sound absorption layer of 2D axisymmetric was modeled by combing the finite element method with genetic algorithm,aiming at the acoustic coating con-taining periodic cylindrical holes. An optimization and design method for the sound absorption layer of cy-lindrical holes was developed under hydrostatic pressure. By optimizing the cavity size and material charac-teristic parameters of sound absorption layer under hydrostatic pressure,the results indicate that compared to atmospheric pressure,the cavity size parameters of the optimization method under hydrostatic pressure decrease,and the method can improve the sound absorption coefficient greatly and can design acoustic coating of different absorption property according to the need of frequency range.