摘要
以圆环形活塞声源为研究对象,在频率小于8.5kHz的范围内,利用微元法计算出了一定尺寸圆环形活塞声源的辐射阻抗的理论值。结果表明:圆环形活塞声源的辐射阻抗与声源的振动频率、活塞声源的环宽密切相关。声源振动频率越大,辐射阻抗越大;声源的环宽(辐射面积)越大,辐射阻抗越大,反之亦然。最后得出了一定尺寸同心圆环形活塞声源的同振质量和平均辐射声功率。
The radiation impendence is very important pararnete~ ~t,t eva.u,^--s the vibration system, and it has a great significance in practice. This paper bases on the ring piston sound source as the research object, using the infinitesimal method to calculate the theoretic value of radiation im- pendence from ring piston source within the scope of frequency value less than 8.5kHz. The results indicate that the radiation impendence of the ring piston sound source is closely related to the vibration frequency of source sound and the ring width of ring piston. The radiation impendence is becoming higher with the increase of vibration frequency of ring piston sound source, and the radiation impendence is becoming higher with the increase of ring width of ring piston, and vice versa. Finally the average acoustic radiation power and the an- nexed mass of radiation impendence from ring piston source are calculated.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期37-40,共4页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金资助项目(11074159)
陕西师范大学研究生培养创新基金资助项目(2013CXS007)
关键词
圆环形活塞
微元法
辐射阻抗
the ring piston
infinitesimal method
radiation impendence
