传感技术学报2025，Vol.38Issue(11)：2000-2008,9.DOI:10.3969/j.issn.1004-1699.2025.11.010
空鼓声振特性的数值仿真及检测方法研究
Study on Numerical Simulation and Detection Method of Acoustic Vibration Characteristics of Hollowing
摘要
Abstract
The surface vibration characteristics of hollowing model under acoustic excitation are studied,and the application method of par-ametric acoustic array in building hollowing detection is explored.The finite element software is used to numerically simulate the vibration effect of the far-field low-frequency sound beam of the parametric acoustic array on the hollowing,the acoustic vibration characteristics un-der the influence of different factors are analyzed,and an experimental system for hollowing detection is establishe.The parametric acoustic array is used as the excitation source to excite the wall to be detected,and the laser vibrometer is used to detect the weak vibration of the wall.According to the collected signals,the vibration displacement diagram of the particles on the surface of the hollowing is drawn to judge the existence and position of the hollowing.The resonance frequency error of the simulation and experiment of the same model is less than 300 Hz,and the estimation error of empty drum size is less than 10 mm.The results show that the tile above the hollowing defect con-forms to the assumption of elastic thin plate fixed around it,and the vibration amplitude of the hollowing surface is obviously higher than that of the non-defective surface,which verifies the feasibility of the hollowing detection method with parameter acoustic array.关键词
非线性声学/空鼓检测/有限元仿真/声参量阵Key words
nonlinear acoustics/hollowing detection/finite element simulation/parametric acoustic array分类
信息技术与安全科学引用本文复制引用
王驰,刘瑞,陈金波..空鼓声振特性的数值仿真及检测方法研究[J].传感技术学报,2025,38(11):2000-2008,9.基金项目
国家自然科学基金项目(62175144) （62175144）
