李冬生

478

  • 教授     博士生导师   硕士生导师
  • 主要任职:建设工程学院副院长
  • 其他任职:土木水利国家教学示范中心主任、辽宁省土木基础设施安全监测与控制重点实验室主任
  • 性别:男
  • 毕业院校:哈尔滨工业大学
  • 学位:博士
  • 所在单位:建设工程学院
  • 学科:结构工程. 桥梁与隧道工程
  • 办公地点:土木工程学院综合3号楼305研究室
  • 联系方式:lidongsheng@dlut.edu.cn
  • 电子邮箱:lidongsheng@dlut.edu.cn

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双层界面下非近轴近似多元高斯模型的相控阵声场模拟

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发表时间:2022-10-10

发表刊物:声学学报

卷号:42

期号:4

页面范围:457-464

ISSN号:0371-0025

摘要:The nonparaxial multi-Gaussian model can overcome the limitation of
   paraxial approximation and guarantee the efficiency of sound field
   simulation under the larger deflection angle. Based on the Rayleigh
   integral model in double media and the nonparaxial multi-Gaussian beam
   model in single medium, a nonparaxial multi-Gaussian beam model of a
   single rectangular array for shear wave detection is proposed. According
   to the delay time of each array for beam steering and focusing, a
   radiation beam field of ultrasonic linear phased array for shear wave
   detection based on a nonparaxial multi-Gaussian beam model is obtained
   through accumulation accordingly. Then this paper calculates the
   radiated sound field produced in the interrogated steel medium by a
   linear phased array transducer mounted on an acrylic wedge, and the
   comparative analysis between the proposed model and the paraxial
   multi-Gaussian beam model is performed to simulate the beam field with
   double interfaces. Simulation results show that the proposed model runs
   faster than the paraxial multi-Gaussian model, and it takes about 1/13
   time of the latter. In addition, comparison analysis results indicate
   that the proposed model can cover the bigger inspection area, has more
   concentrated energy, and is more suitable for the far field detection.

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