摘要
引入负声源,导出了凹球面状环形换能器声场的简洁表示式。通过数值计算,研究了凹球面状环形阵列的阵元几何尺寸、阵元分布和阵元数及激励信号等因素对声场特征的影响,分析了此类阵列的相控聚焦效果。
A brief expression of sound field induced by an annular transducer made of concave spherical piezoelectric ceramic is derived by introducing a negative sound source. The influences of various factors such as the geometrical size of the ring, the number of rings, the distribution of array elements and the electric signal to excite the individual element on the characteristics of sound fields are studied through numerical calculations, and the focused effect of this phased array are analyzed.
出处
《压电与声光》
CSCD
北大核心
2005年第4期379-381,403,共4页
Piezoelectrics & Acoustooptics
基金
湖南省自然科学基金资助项目(02JJY2059)
湖南省教育厅资助科研项目(02C201)
关键词
热疗
聚焦超声
环形阵列
声场
hyperthermia
focused ultrasound
annular arrays
sound field
