CAJ | 학술논문

针对传统声发射源定位算法（如时差定位）应用于各向异性介质的局限性，将声发射层析成像方法（ AE tomography）引入混凝土结构损伤定位，该算法以声发射事件作为点源，结合源定位算法和层析成像算法，通过波速变化重建物体结构缺陷（损伤）的慢度图，既适合于各向同性材料，也适合于各向异性材料。为了验证提出算法的可行性，制作了有和无钢筋2个不同结构的混凝土样本并通过了实验。实验结果表明所提出的方法不仅能通过声发射波速度变化实现损伤定位的可视化，而且相对于传统定位算法，混凝土样本结构缺陷（损伤）的定位精度也获得了进一步提高。
침대전통성발사원정위산법（여시차정위）응용우각향이성개질적국한성，장성발사층석성상방법（ AE tomography）인입혼응토결구손상정위，해산법이성발사사건작위점원，결합원정위산법화층석성상산법，통과파속변화중건물체결구결함（손상）적만도도，기괄합우각향동성재료，야괄합우각향이성재료。위료험증제출산법적가행성，제작료유화무강근2개불동결구적혼응토양본병통과료실험。실험결과표명소제출적방법불부능통과성발사파속도변화실현손상정위적가시화，이차상대우전통정위산법，혼응토양본결구결함（손상）적정위정도야획득료진일보제고。
In order to overcome the limitations of the application of traditional acoustic emission (AE) source location algorithm (such as time of arrival (TOA)) to anisotropic medium, the AE tomo-graphy is introduced into the damage location of concrete structure.In this algorithm, the AE events are taken as the point sources.Combining the source location algorithm with the tomography algo-rithm, the slowness image for structure defect ( damage) is reconstructed according to the change of the wave speed, which is fit for both isotropic medium and anisotropic medium.To verify the feasibil-ity of the proposed algorithm, two concrete samples with and without reinforcement are manufactured and tested.The experimental results show that by the proposed method the defect (damaged) area in the concrete structures can be visualized by wave slowness image.Besides, compared with traditional location algorithm, the location precision obtained by this method is improved obviously.