【摘要】 应用声发射检测技术,通过预应力混凝土梁的分级加载破坏试验,收集全过程声发射数据,以地震学b值理论为基础,论证采用最小二乘法对声发射振幅值与累积频度进行一元二次线性拟合的可行性,详细说明计算方法,并研究所求常量b值和a值的变化情况。结果表明:采用地震学b值理论分析声发射数据是可行的。更多还原

【Abstract】 Application of acoustic emission detection technology,through the classification of prestressed concrete beam load failure test,collect acoustic emission data of the whole test process,based on the theory of b-value in seismology,then described in detail the feasibility and method of using the least square method to carry out the linear fitting of the amplitude value and the cumulative frequency of the acoustic emission,at last discuss the change of the b-value and a-value.The results show:the analysis of acoustic emission data is feasible by using the theory of b-value in Seismology.更多还原