针对矩形网格模型的声波层析成像检测结构混凝土存在的主要问题:1)矩形网格无法充分模拟结构混凝土的速度间断面、2)射线追踪面临穿到凹多边形检测区域之外或穿越内部预留空洞的风险,本文研究了三角网声波层析成像检测技术.依据Delaunay三角剖分的优化准则,结合波前法对模型进行三角剖分;采用“基于波前最小走时单元的三角网射线追踪全局算法”计算声波初至时、追踪射线路径;应用代数重构技术求解层析成像反演控制方程,得到模型的速度分布.数值模拟及应用实例表明,三角网声波层析成像,模型参数化灵活、速度间断面描述准确,射线追踪可靠性强、精度高,反演成像分辨率高、更接近实际结构形态,适应具有复杂几何边界和内部结构的结构混凝土的质量检测. Acoustic tomography of rectangular grid model to detect the main problems of structural concrete: 1) the rectangular grid can not fully simulate the velocity discontinuity of structural concrete, 2) the ray tracing face to wear outside the concave polygon detection area or through the internal pre- In order to reduce the risk of leaving holes, this paper studies the detection technique of triangulation acoustic tomography.According to the Delaunay Triangulation Optimization Criterion and the wavefront method, the model is triangulated. Using the method of triangulation based on the minimum travel time element Tracking the global algorithm "to track the ray path at the first arrival of the acoustic wave and solving the tomographic inversion control equation using algebraic reconstruction technology to obtain the velocity distribution of the model. Numerical simulation and application examples show that the triangular network acoustic tomography, the model The parameterization is flexible, the description of the velocity discontinuity is accurate, the ray tracing is reliable, the precision is high, the resolution of the inversion imaging is high, and it is closer to the actual structure and shape. It is suitable for the quality inspection of structural concrete with complex geometric boundaries and internal structures.