水泥土无侧限压缩的声发射信号特性
发布时间：2018-08-02 09:08
【摘要】：为研究水泥土在无侧限压缩过程中的声发射信号特性,利用声发射技术对水泥土的无侧限压缩过程进行全程监测。通过对水泥土力学特性参数进行分析,得到水泥土在无侧限压缩下应力随时间的变化过程大致分为四个阶段;同时运用声发射特性参数分析法对水泥土试件的声发射信号参数经历图和分布图进行分析,得出水泥土压缩过程中各声发射特性参数也大致分为四个阶段,每个阶段与力学特性参数各阶段基本相一致。通过对声发射信号特征参数的四个通道分析和对比各通道传感器处试件受破坏后的试验实图,验证了声发射信号参数能准确反映材料的破坏程度,为以后用声发射技术预报、检测结构破坏过程和破坏程度提供了依据。
[Abstract]:In order to study the characteristics of acoustic emission (AE) signals of cement-soil in the process of unconfined compression, acoustic emission (AE) technology was used to monitor the whole process of unconfined compression of cement-soil. By analyzing the mechanical properties of cement-soil, it is found that the stress variation process of cement-soil under unconfined compression is divided into four stages. At the same time, acoustic emission characteristic parameter analysis method is used to analyze the acoustic emission signal parameter experience diagram and distribution diagram of cement soil specimen, and it is concluded that each acoustic emission characteristic parameter of cement soil compression process is also roughly divided into four stages. Each stage is basically consistent with the mechanical characteristic parameters. By analyzing the characteristic parameters of acoustic emission signals in four channels and comparing the experimental images of the specimens with different channels of sensors, it is verified that the parameters of acoustic emission signals can accurately reflect the damage degree of materials, which can be used to predict the damage degree of materials in the future by means of acoustic emission technology. The damage process and damage degree of the structure are tested.
【作者单位】： 东北林业大学土木工程学院;济宁市勘测院;
【基金】：哈尔滨市优秀学科带头人基金(2013RFXXJ033) 黑龙江省自然基金(E201249)资助
【分类号】：TU52
本文编号：2158945
[Abstract]:In order to study the characteristics of acoustic emission (AE) signals of cement-soil in the process of unconfined compression, acoustic emission (AE) technology was used to monitor the whole process of unconfined compression of cement-soil. By analyzing the mechanical properties of cement-soil, it is found that the stress variation process of cement-soil under unconfined compression is divided into four stages. At the same time, acoustic emission characteristic parameter analysis method is used to analyze the acoustic emission signal parameter experience diagram and distribution diagram of cement soil specimen, and it is concluded that each acoustic emission characteristic parameter of cement soil compression process is also roughly divided into four stages. Each stage is basically consistent with the mechanical characteristic parameters. By analyzing the characteristic parameters of acoustic emission signals in four channels and comparing the experimental images of the specimens with different channels of sensors, it is verified that the parameters of acoustic emission signals can accurately reflect the damage degree of materials, which can be used to predict the damage degree of materials in the future by means of acoustic emission technology. The damage process and damage degree of the structure are tested.
【作者单位】： 东北林业大学土木工程学院;济宁市勘测院;
【基金】：哈尔滨市优秀学科带头人基金(2013RFXXJ033) 黑龙江省自然基金(E201249)资助
【分类号】：TU52
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