CAJ | 학술논문

为了得到不同频率下正交各向异性复合材料层合板的传声损失,基于传递矩阵的方法,推导出层合板的传声损失计算公式.通过建立复合材料层合板的传声计算模型,研究了层合板铺设角度、板厚度和板密度等结构参数对层合板的传声损失影响.计算结果表明:复合材料的密度与传声损失之间没有明显的线性关系,而是随着频率的增加而上升;层合板的总厚度越大,传声损失也越大,而且各层之间厚度不同,也会引起传声损失的较大改变;层合板铺层角度越大,传声损失也越大.采用传递矩阵法能充分考虑复合材料层合板的铺设方式和铺层角度等因素的影响,利用层合板层间的速度和应力连续边界条件,准确的反应复合材料层合板隔声性能.
위료득도불동빈솔하정교각향이성복합재료층합판적전성손실,기우전체구진적방법,추도출층합판적전성손실계산공식.통과건립복합재료층합판적전성계산모형,연구료층합판포설각도、판후도화판밀도등결구삼수대층합판적전성손실영향.계산결과표명:복합재료적밀도여전성손실지간몰유명현적선성관계,이시수착빈솔적증가이상승;층합판적총후도월대,전성손실야월대,이차각층지간후도불동,야회인기전성손실적교대개변;층합판포층각도월대,전성손실야월대.채용전체구진법능충분고필복합재료층합판적포설방식화포층각도등인소적영향,이용층합판층간적속도화응력련속변계조건,준학적반응복합재료층합판격성성능.
The sound transmission loss formula of orthotropic composite laminate plates was introduced for different frequencies on the basis of transfer matrix method. An audio computation model of composite laminates was established, influence of some structural parameters such as laminate lay-out angle, plate thickness and density on transmission loss of the laminated plate was analyzed. The results show that there is no obvious linear relationship between density of composite laminates and sound transmission loss. The sound transmission loss increases with frequency increasing and the total thickness of the composite laminates increasing. Even the different thickness and lay-out angle of each laminate can cause the change of the sound transmission loss. With the use of the transfer matrix method, the effect of laying method, lay-out angle and some other factors of the composite laminates can be fully considered. Using the continuity condition of speed and stress in the interface of the laminates, the sound insulation property of the composite laminate plates can be accurately calculated.