摘要
研究了方形环状活塞声源的辐射特性,利用瑞丽积分,计算了它的远场辐射声压分布以及指向性公式,并绘出了辐射声压的远场指向性图,同时与圆形环状活塞声源的指向性作了对比.结果表明,当方形环状活塞的尺寸一定时,辐射频率增大,辐射声场指向性增强;在同一声波频率以及相同尺寸的情况下,方形环状活塞要较圆形环状活塞的远场指向性更尖锐.
Radiated sound field of quadrate ring plunger is analyzed. Radiation pressure and directional formulation are calculated out by Reily-Integrate,and directional diagram is plotted. At the same time, making a contrast with the pattern of ring plunger, result shows that directivity intensifies with the increase of frequency; at the same value of frequency and size, directivity of quadrate ring plunger is more sharper than that of ring plunger.
出处
《河南教育学院学报（自然科学版）》
2008年第1期32-33,共2页
Journal of Henan Institute of Education(Natural Science Edition)
关键词
方形环状活塞
辐射声压
指向性
quadrate ring plunger
radiation pressure
directivity
