Ultrasonic Scattered Field Distribution of One and Two Cylindrical Solids with Phased Array Technique

作     者：Xiaozhou Liu Jian Ma Haibin Wang Sha Gao Yifeng Li Jiehui Liu 

作者机构：Key Laboratory of Modern AcousticsInstitute of Acoustics and School of PhysicsNanjing UniversityNanjing 210093China College of Computer Science and TechnologyNanjing University of TechnologyNanjing 211800China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2019年第32卷第6期

页      面：101-112页

核心收录：

学科分类：07[理学] 08[工学] 070206[理学-声学] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：Supported by National Key R&D Program of China(Grant No.2016YFF0203000) State Key Program of National Natural Science Foundation of China(Grant No.11834008) National Natural Science Foundation of China(Grant Nos.11774167,61571222) Fundamental research funds for the Central Universities(Grant No.020414380001) State Key Laboratory of Acoustics,Chinese Academy of Science(Grant No.SKLA201809) Key Laboratory of Underwater Acoustic Environment,Chinese Academy of Sciences(Grant No.SSHJ-KFKT-1701) AQSIQ technology R&D program(Grant No.2017QK125) Innovative Talents Program of Far East NDT New Technology&Application Forum 

主　　题：Ultrasonic phased array Scattered field distribution Directivity Quantification of scattered image 

摘      要：The scattered fields of plane waves in a solid from a cylinder or sphere are critical in determining its acoustic characteristics as well as in engineering applications. This paper investigates the scattered field distributions of different incident waves created by elastic cylinders embedded in an elastic isotropic medium. Scattered waves, including longitudinal and transverse waves both inside and outside the cylinder, are described with specific modalities under an incident plane wave. A model with a scatterer embedded in a structural steel matrix and filled with aluminum is developed for comparison with the theoretical solution. The frequency of the plane wave ranged from 235 kHz to 2348 kHz, which corresponds to scaling factors from 0.5 to 5. Scattered field distributions in matrix materials blocked by an elastic cylindrical solid have been obtained by simulation or calculated using existing parameters. The simulation results are in good agreement with the theoretical solution, which supports the correctness of the simulation analysis. Furthermore, ultrasonic phased arrays are used to study scattered fields by changing the characteristics of the incident wave. On this foundation, a partial preliminary study of the scattered field distribution of double cylinders in a solid has been carried out, and the scattered field distribution at a given distance has been found to exhibit particular behaviors at different moments. Further studies on directivities and scattered fields are expected to improve the quantification of scattered images in isotropic solid materials by the phased array technique.