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FDTD方法的改进及在超声波声场计算中的应用

徐娜 李洋 周正干 于光

徐娜, 李洋, 周正干, 等 . FDTD方法的改进及在超声波声场计算中的应用[J]. 北京航空航天大学学报, 2013, (1): 78-82.
引用本文: 徐娜, 李洋, 周正干, 等 . FDTD方法的改进及在超声波声场计算中的应用[J]. 北京航空航天大学学报, 2013, (1): 78-82.
Xu Na, Li Yang, Zhou Zhenggan, et al. Improvement of finite difference time domain method and its application to calculation of ultrasonic sound fields[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (1): 78-82. (in Chinese)
Citation: Xu Na, Li Yang, Zhou Zhenggan, et al. Improvement of finite difference time domain method and its application to calculation of ultrasonic sound fields[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (1): 78-82. (in Chinese)

FDTD方法的改进及在超声波声场计算中的应用

基金项目: 国家商用飞机制造工程技术研究中心创新基金资助项目(201112)
详细信息
  • 中图分类号: TB 553

Improvement of finite difference time domain method and its application to calculation of ultrasonic sound fields

  • 摘要: 时域有限差分法(FDTD, Finite Difference Time Domain)是建立超声检测模型的有效手段,然而在相邻两种介质的分界面上,两种介质声阻抗的突变会引起差分计算的不稳定.为了解决上述问题,从常规FDTD方法入手,提出将界面两边介质的声学参数在界面处进行平均处理的方法,对FDTD方法进行了改进;然后分别采用常规FDTD方法和改进方法对相邻两种介质声阻抗相差5个数量级的模型进行了声场计算;最后对超声换能器进行了有限差分声场计算和实际检测实验对比.研究结果表明:改进的FDTD方法是超声波声场计算中一种有效可行的数值方法.

     

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出版历程
  • 收稿日期:  2011-10-13
  • 刊出日期:  2013-01-31

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