| 小球散射超声脉冲声场的指向性 |
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| 引用本文： | 徐圆飞,徐春广,肖定国,周世圆,武婧.小球散射超声脉冲声场的指向性[J].声学技术,2009,28(5):615-619. |
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| 作者姓名： | 徐圆飞 徐春广 肖定国 周世圆 武婧 |
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| 作者单位： | 1. 北京理工大学机械与车辆工程学院,北京,100081;北京航星机器制造公司,北京,100013
2. 北京理工大学机械与车辆工程学院,北京,100081 |
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| 基金项目： | 国防科学技术工业委员会"十一五"项目 |
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| 摘 要： | 基于对小球散射单频连续声场的研究,利用傅立叶变换对换能器激发的小球散射的脉冲声场进行分析,推导了小球散射脉冲声场的指向性函数计算公式,并计算了指向性函数值。与实验结果对比表明,在换能器中心频率较低、刚性小球半径较小的情况下,所推导的计算公式是可靠的。
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| 关 键 词： | 单频稳态声场 脉冲声场 散射指向性 超声换能器 |
| 收稿时间： | 2008/8/20 0:00:00 |
| 修稿时间： | 2008/11/17 0:00:00 |
Directivity of pulse acoustic field scattered by small ball |
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| XU Yuan-fei,XU Chun-guang,XIAO Ding-guo,ZHOU Shi-yuan and WU Jing.Directivity of pulse acoustic field scattered by small ball[J].Technical Acoustics,2009,28(5):615-619. |
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| Authors: | XU Yuan-fei XU Chun-guang XIAO Ding-guo ZHOU Shi-yuan and WU Jing |
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| Affiliation: | School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;Beijing HangXing Machine Manufacturing Company, Beijing 100013, China;School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | On the basis of the study about the single frequency continuous acoustic field scattered by small ball, the pulse acoustic field scattered by small ball is analyzed by using the Fast Fourier Transform. The calculation formula of the directivity function of the scattering acoustic field is discussed, and the value of directivity function is calculated. Comparison with the results of experiments shows that the formula is reliable in the condition of lower center frequency transducer and smaller ball. |
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| Keywords: | single frequency continuous acoustic field pulse acoustic field scattering directivity ultrasonic transducer |
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