Abstract：The traditional acoustic vibration technology has many problems in practical engineering applications, such as fuzzy identification parameters, complex operation process, etc. In order to solve this problem, a fast identification method of concrete void based on acoustic frequency threshold estimation is proposed in this paper. The acoustic-solid coupling finite element model is established by using comsol software, and the void model under various work conditions is numerically simulated, and the changing rules of sound pressure, frequency and other related parameters are obtained. The void identification parameters of concrete based on air-coupled impact echo method are proposed and further explored and verified by physical model tests. The research shows that compared with the depth of the void, the influence of the void width on the fundamental frequency of the acoustic wave is significantly improved. When width C>0.35m, the first mode becomes the dominant mode, and the fundamental frequency of the sound wave decreases with the increase of the void width, and the change is obvious. The method based on the air coupling technology can effectively identify the void with a width greater than 0.35m, The identification parameters in this study can be used to quickly and effectively identify the cavity in the concrete structure with a depth of less than 0.4m. The research results will be beneficial to the damage detection and state assessment of concrete structures such as tunnels and bridges.
赵维刚1,鞠景会2,田秀淑3,杨勇1,程泉森4. 基于声频阈值估计的混凝土空洞快速识别方法研究[J]. 振动与冲击, 2023, 42(24): 136-142.
ZHAO Weigang1，JU Jinghui2，TIAN Xiushu3，YANG Yong1，CHENG Quansen4. A fast recognition method of concrete void based on acoustic frequency threshold estimation. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(24): 136-142.
[1] 田秀淑，杜颜良，赵维刚.基于瞬态冲击响应特性的 无砟轨道砂浆层脱空的检测和识别[J].振动与冲击，2019，38(18):148-153.
Tian Xiushu, Du Yanliang, Zhao Weigang. Detection and identification of mortar void in the ballastless track of high-speed railway based on transient impact characteristics [J]. Journal of Vibration and Shock, 2019,38 (18): 148-153.
[2] 杨勇，芦俊伟，李荣喆，等.基于Burg功率谱的无砟轨道功能层缺陷边缘估计方法研究[J].振动与冲击，2020，39(10):1-6.
Yang Yong, Lu Junwei, Li Rongzhe, et al. Analysis on edge estimation of functional layer defect in ballastless track based on Burg power spectrum [J]. Journal of Vibration and Shock, 2020,39 (10): 1-6.
[3] 廖红建，朱庆女，昝月稳，等． 基于探地雷达的高铁无砟轨道结构层病害检测［J］．西南交通大学学报，2016，51(1) : 8－13．
Liao Hongjian, Zhu Qingnu, Luo Yueshan, et al. Detection of Ballastless Track Diseases in High-Speed railway Based on Ground Penetrating radar [J]. Journal of Southwest Jiaotong University, 2016，51 (1): 8-13.
[4] Yang Yong，Zhao Weigang，Du Yanliang，et al．Analysison directional featrure extraction for the target identification of shallow subsurface based on curvelet tranform [J].DYNA，2017，92( 3) : 293-299．
[5] Zhu J, Popovics J S. Air‐coupled impact‐echo method for ndt of concrete[J]. American Institute of Physics, 2006,25:1351-1357.
[6] Oh T, Popovics J S, Ham S, et al. Improved interpretation of vibration responses from concrete delamination defects using air–coupled impact resonance tests[J]. Journal of Engineering Mechanics Asce, 2013, 139(3):315-324.
[7] Oh T, Popovics J S. Application of impact resonance c–scan stack images to evaluate bridge deck conditions. Journal of Infrastructure Systems, 2015, 21(1):1-8.
[8] Oh T, Popovics J S. Practical visualization of local vibration data collected over large concrete elements. Computer–Aided Civil and Infrastructure Engineering, 2015, 30(1):68-81.
[9] 刘蒙.基于麦克风冲击共振法的钢–混凝土组合结构脱空损伤诊断研究[D].湖南大学，2018.
Liu Meng. Diagnosis of interface debonding in steel–concrete composite structures using Air–coupled Impact Resonance Test [D]. Hunan University, 2018.
[10] 杜圆，李海超，庞福振，缪旭弘.任意边界条件下矩形板薄板自由振动特性分析[J].振动与冲击.2019, 38(19):70-76.
Du Yuan,Li Haichao, Pang Fuzhen,Free vibration characteristics of rectangular thin plates under arbitrary boundary conditions [J]. Journal of Vibration and Shock. 2019,38 (19): 70-76.
[11] 王青山，史冬岩，罗祥程.任意边界条件下矩形板的面内自由振动特性[J].华南理工大学学报(自然科学版).2015，43(06):127-134.
Wang Qingshan, Shi Dongyan, Luo Xiangcheng. In-plane free vibration characteristics of rectangular plates under arbitrary boundary conditions [J]. Journal of South China University of Technology (Natural Science Edition). 2015,43 (6): 127-134.
[12] Warburton G.B. The vibration of rectangular plates[M]. Proceedings of the Institute of Mechanical Engineers,1954，168：371–384.
[13] Leissa A W. The free vibration of rectangular plates[J]. Journal of Sound and Vibration.1973,31(3): 257-293.
[14] Ventsel E S, Krauthammer T. Thin plates and shells: theory, analysis, and application[M]. Marcel Dekker, Inc. New York, 2001.
[15] 赵盛杰.基于冲击回波的混凝土桥面板分层缺陷检测方法研究[D].大连理工大学，2021.
Zhao Shengjie. Research on Delamination Detection in Concrete Bridge Decks using Impact-Echo Method [D]. Dalian University of Technology, 2021.
[16] Seong-Hoon Kee, Nenad Gucunski. Interpretation of Flexural Vibration Modes from Impact-Echo Testing[J]. Journal of Infrastructure Systems.2016,22(3):1-10.
[17]C.Cheng, M.Sansalone. The impact-echo response of concrete plates containing delaminations-Numerical, experimental and field studies[J]. Materials and Structures,1993,26:274-285.
[18]李乐,刘文峰.声音识别结构模态方法的研究 . 科学技术与工程 ,2010,10(22):5441-5444
Lile, Liu wenfeng. Research on Structural modal methods for sound recognition.Science Technology and Engineering,2010,10(22):5441-5444.
