摘要
穿孔板吸声结构在空气噪声控制和改造方面得到了广泛的应用,但关于穿孔板结构水下应用的研究和报道却很少。利用传递矩阵法详细分析了水下穿孔板结构的透声特性,理论推导得出了垂直入射声压透射系数随频率变化的关系式。对典型的双层穿孔板结构的透声特性进行了仿真,并对影响声压透射系数的各项因素进行了分析与讨论。设计并搭建了驻波管测试系统,利用基于四传感器的传递函数法对自制的双层穿孔板结构进行了测量。垂直入射声压透射系数的测量值与理论计算值基本吻合,从而验证了理论分析的正确性。
The sound transmission characteristics of underwater perforated-panel structure are analyzed by transfer matrix method theoretically. The sound transmission coefficient of normal incidence is presented and the transmission characteristics of the two-layer structure are simulated. The factors affecting the transmission characteristics are analyzed and discussed. A measurement system for standing-wave duct is designed, and a self-made two-layer perforated-panel structure is tested. The sound transmission characteristics are obtained by transfer function method based on four-sensors. The experimental results accord well with the theoretical ones, which prove the corretness of the theoretical analysis.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第3期154-156,共3页
Journal of Vibration and Shock
基金
国家863计划(2006AA09Z121)
国防科技大学优秀研究生创新项目(0623)资助课题
关键词
穿孔板
透声系数
传递矩阵
驻波管
perforated-panel
transmission coefficient
transfer matrix
standing-wave duct
