改进的弯曲振动板辐射声场研究  

Study on radiated sound field of improved flexural vibrating plate

作　　者：郑珂[1] 贺西平[1] 张频[2] 

机构地区：[1]陕西师范大学应用声学研究所 [2]西安建筑科技大学理学院,陕西西安710055

出　　处：《陕西师范大学学报（自然科学版）》2008年第3期40-43,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2007A07)

摘　　要：从薄圆板振动特性出发,提出了一种改进的弯曲振动板.利用瑞利积分,求出板作一阶振动时辐射声压及指向性表达式,绘出自由边界条件下弯曲振动板轴对称弯曲振动辐射声压的远场指向性图,与薄圆板作一阶弯曲振动时的声场指向性图作了对比.结果表明,改进后的弯曲振动板轴向声压不为零,而且指向性比薄圆板更尖锐.这为此类板的理论设计及实际应用提供了一定的理论依据.A kind of improved flexural vibrating plate is put forward based on the analyzing of vibration characteristics The radiation pressure and directional formulation of the first vibration mode are calculated by use of Rayleigh-integration, the directional pattern in free boundary is plotted with the help of computer. Comparing the directional pattern with that of the flexural circular thin plate, the result shows that improved flexural vibrating plate＇s axial radiation pressure is not zero, and its directional pattern is sharper. Moreover, this study provides a theoretical calculation basis for design and practical applications of this kind of flexural vibrating plate.

关 键 词：弯曲振动板 辐射声场 指向性 

分 类 号：O426.1[理学—声学]