不同边界条件下改进的弯曲振动板辐射声场的对比性研究  

The Contrastive Study on Radiated Sound Field of Improved Flexural Vibrating Plate with Different Boundary Condition

作　　者：郑珂[1] 

机构地区：[1]陕西教育学院数理工程系,陕西西安710061

出　　处：《陕西教育学院学报》2009年第4期79-83,共5页Journal of Shaanxi Institute of Education

基　　金：陕西教育学院科研基金项目(08KJ028)

摘　　要：利用薄板的弯曲振动理论推导出了不同边界条件下,改进弯振圆板在不同振动模式下的波节圆半径。利用瑞丽积分求解出了具有一个环带辐射区的弯振板的通用声压及指向性表达式,编制程序并绘出了弯振板轴对称弯曲振动时辐射声压的远场指向性图,同时对不同边界的声场指向性图作了对比。结果表明自由边界的改进弯振圆板辐射声场指向性最强。本文为此类弯振板的理论设计及实际应用提供了一定的理论依据。Using the theory of the plate＇s flexural vibration,the wave nodal circular radius with different vibration modes and boundary conditions is deduced.The radiation sound pressure and directional formulation of the plates with one circular ring are deduced by use of Rayleigh-integration and the directional pattern is plotted by programming.The result shows that directional pattern of improved flexural vibrating plate with free boundary condition is the strongest.The paper provides theoretical calculation basis for design and practical applications of this kind of flexural vibrating plate.

关 键 词：改进弯曲振动板 辐射声场 指向性对比 

分 类 号：O422.2[理学—声学]