自然科学版
陕西师范大学学报(自然科学版)
专题研究
方形活塞声源辐射阻抗的数值计算
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任惠娟,贺西平,胡新伟
(陕西师范大学 应用声学研究所, 陕西 西安 710062)
任惠娟,女,硕士研究生,讲师,主要从事超声工程、声传感器及信号处理研究.
摘要:
利用高斯数值积分方法,推导了方形活塞辐射阻抗的三重积分表达式,计算了方形活塞声源的辐射阻抗.结果表明,方形活塞的辐射阻抗是波数和活塞边长乘积的函数,系统在高频段向外辐射的声功率比低频段大,高频段同振质量比低频段小.
关键词:
方形活塞; 辐射阻抗; 数值计算
收稿日期:
2005-10-12
中图分类号:
O422.2
文献标识码:
A
文章编号:
1672-4291(2006)03-0052-04
基金项目:
陕西省教育厅专项科研基金资助项目(2004KJ239)
Doi:
Numerical calculation of radiation impedance of the square piston
REN Hui-juan, HE Xi-ping, HU Xin-wei
(Institute of Applied Acoustics, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Triple integral expression of the radiation impedance of square piston is deduced and the numerical results of the radiation impedance are calculated with the method of Gaussian numerical integral. It is shown that radiation impedance is a function of the product of wave number and side length, the sound power is greater and the adnexed mass is smaller in the higher frequency than those in the lower one respectively.
KeyWords:
square piston; radiation impedance; numerical calculation