CAJ | 학술논문

基于声学边界条件,建立了聚氨酯/环氧树脂(PU/EP)弹性体的水声模型,探讨了弹性体弹性模量、损耗因子及泊松比对其声学性能的影响；在水声脉冲声管中测试了PU/EP 的水声性能并进行了算例验证.仿真结果表明,较大的模量、合适的阻尼因子和较高的泊松比是 PU/EP 弹性体获得低反射、高吸声性能的关键.水声测试结果表明,PU/EP(70/30)弹性体的平均吸声系数为0．39,最大吸声系数为0．42,且反射系数在整个频段范围内小于0．4,可作为水声吸声材料的基材.算例验证表明,计算结果与实验测量结果吻合的较好.
기우성학변계조건,건립료취안지/배양수지(PU/EP)탄성체적수성모형,탐토료탄성체탄성모량、손모인자급박송비대기성학성능적영향；재수성맥충성관중측시료PU/EP 적수성성능병진행료산례험증.방진결과표명,교대적모량、합괄적조니인자화교고적박송비시 PU/EP 탄성체획득저반사、고흡성성능적관건.수성측시결과표명,PU/EP(70/30)탄성체적평균흡성계수위0．39,최대흡성계수위0．42,차반사계수재정개빈단범위내소우0．4,가작위수성흡성재료적기재.산례험증표명,계산결과여실험측량결과문합적교호.
An underwater acoustic model of polyurethane/epoxy resin (PU/EP)elastomer was established based on the acoustic boundary conditions,the influences of the PU/EP elastomer’s elastic modulus,loss factor and Poisson’s ratio to its acoustic performance;the underwater acoustic property of PU/EP(70/30)elastomer was tested on underwater acoustic pulsetube system.The simulation results showed that larger modulus,suitably damping factor and higher Poisson ratio were the key to obtain low reflection and high acoustic absorption per-formance.The underwater acoustic test results showe that the average acoustic absorption coefficient of PU/EP (70/30)elastomers was 0.39,the maximum absorption coefficient was 0.42,and the reflection coefficient over the entire frequency range of less than 0.4,it can be used as acoustic absorbing material matrix.And the numer-ical examples show the experimental results of PU/EP elastomer were basically consistent with the acoustic model simulation results.