提升水下角反射器声反射性能的泡沫塑料夹层方法  

A Foam Interlayer Method for Improving on the Acoustic Reflection Capability of Underwater Corner Reflector

作　　者：罗祎[1] 王杰亚 谢涛涛 LUO Yi;WANG Jieya;XIE Taotao(School of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China)

机构地区：[1]海军工程大学兵器工程学院,湖北武汉430033

出　　处：《兵工学报》2020年第10期2081-2087,共7页Acta Armamentarii

摘　　要：常见的金属板角反射器水声目标强度及散射稳定性均不理想,为此,根据水-反射层声阻抗失配原则,提出利用低阻抗泡沫塑料夹层提高角反射器声反射性能的方法。设计水下聚氨酯泡沫夹层板,计算其声反射系数,并从频率、入射角度等方面与单层金属板声反射性能进行对比;在此基础上,构建一种新的聚氨酯泡沫夹层角反射器,并针对水下角反射器的凹形浸水薄壁结构,采用有限元软件ANSYS结合声学软件SYSNOISE,对水下泡沫夹层角反射器与金属板角反射器的声散射特性进行仿真计算和对比;在消声水池对两种角反射器声反射性能进行对比实验。研究结果表明,在同样边长条件下,聚氨酯泡沫夹层角反射器比金属板角反射器具有更优的声反射性能,其目标强度及散射稳定性均优于金属板角反射器,证明了该方法的有效性。For the unsatisfactory acoustic target strength and scattering stability of common underwater metal corner reflector,a method for improving the acoustic reflection performance of corner reflector by using low impedance foam interlayer was proposed according to the principle of water-reflector layer acoustic impedance mismatch,and a polyurethane foam interlayer plate was designed.Its acoustic reflectance was calculated,and was compared with that of monolayer metal plate in terms of frequency and incident angle.Based on this,a new polyurethane foam interlayer corner reflector is constructed.Considering the concave shape and submerged thin-wall structure of the underwater corner reflector,the acoustic scattering characteristics of the underwater foam interlayer corner reflector and the metal plate corner reflector are simulated and compared by using the finite element software ANSYS combined with the acoustic software SYSNOISE.Finally,the contrast experiments of the two kind corner reflectors were carried out in anechoic pool.The results show that the polyurethane foam interlayer corner reflector has better acoustic reflection performance than the metal plate corner reflector,and its target strength and scattering stability are better under the condition of the same side length.

关 键 词：水下角反射器 声反射性能 泡沫塑料 夹层 

分 类 号：TB566[交通运输工程—水声工程]