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Trans. Nonferrous Met. Soc. China 22(2012) 3087-3094 Three-dimensional analytical solution of acoustic emission or microseismic source location under cube monitoring network DONG Long-jun, LI Xi-bing School of Resources and Safety Engineering, Central South University, Changsha 410083, China Received 11 May 2012; accepted 18 August 2012 Abstract: To find the analytical solution of the acoustic......
:A 文章编号:1672-7207(2017)07-1923-07 Model simulation and experimental research of acoustic-plane installation angle of multi-path ultrasonic gas flowmeter TANG... was built and the velocity distribution inside the pipeline was obtained by means of computational fluid dynamics (CFD). The calculation of transit-time of acoustic waves was operated by adding up transit......
in this work. A new method of Vickers hardness indentation combined with acoustic emission was used to test the brittleness of the magnets.The results show that the magnetic properties of the magnets... that acoustic emission energy accumulated count value could be used to characterize the material brittleness. The bending fracture morphologies of the as-sintered and the optimal aged NdFeB magnets were......
有色金属先进结构材料与制造协同创新中心,湖南 长沙,410083) 摘要:针对电磁超声换能器(electromagnetic acoustic transducer, EMAT)接收信号十分微弱的问题,建立包括螺旋线圈EMAT换能过程和接收等效电路的场路耦合有限元模型;分析阻抗匹配参数,线圈导线直径,前置放大器的输入阻抗和铜背底至线圈间距对EMAT接收效率的影响规律.研究结果表明:当线圈导线直径... electromagnetic acoustic transducer in non-ferromagnetic metal material SHI Wenze1, 2, WU Yunxin1, 2, 3, GONG Hai1, 2, 3, ZHANG Tao1, 2, TAN Liangchen1, 2, HAN Lei1, 3 (1. State Key Laboratory of High Performance......
; 文章编号:1672-7207(2017)08-2251-06 Acoustic and vibration characteristics of vibration reduction double-block ballastless track WANG Genping, LI Chenghui, CHEN Daixiu, DUAN Haibin... attenuation and acoustic radiation vibration of reduction double-block ballastless track, the vibration mechanical model and acoustic boundary element model were established with the method of FEM/BEM......
Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Rockburst is a dynamic phenomenon accompanied by acoustic emission (AE) activities. It is difficult... rockburst. This is a meaningful attempt on predicting rockburst. Key words: rockburst; precursory information; acoustic emission; information entropy; dominant frequency; evolution model Cite......
号:TF811 文献标志码:A 文章编号:1672-7207(2013)11-4694-08 Denoising processing on acoustic emission..., Changsha 410083, China; 2. Commercial College, Hunan International Economics University, Changsha 410205, China) Abstract: In order to improve measurement accuracy of acoustic emission signals from......
;损伤;位错 中图分类号:TU457 文献标志码:A 文章编号:1672-7207(2017)07-1875-08 Experimental study on character of acoustic emission... Mechanics, Chinese Academy of Sciences, Wuhan 430071, China) Abstract: An experimental research on salt rock’s fatigue damage and character of its acoustic emission (AE) to reveal the influence of time......
and discrete derivation of signals, transient feature points of power signals and acoustic signals were found through data mining, and the mapping model of drilling process and monitor signals could be built based on these transient characteristics. The results show that when drill tip start to cut in the feature points can be found from power and acoustic signals in the time error of 0.7%, when......
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