摘要
在岩石声发射实验中,合理布置声发射传感器至关重要。声发射传感器一般在夹具夹持情况下通过凡士林紧密贴合在岩样表面,常规方法操作比较繁琐,并且裸露在外的声发射传感器及其数据传输线很可能对其他实验和操作造成干扰。针对这一问题,研制了一套适用于多种试样尺寸的声发射传感器布置安装系统,并开展了相应的岩石直剪声发射试验和单轴压缩声发射试验,能够实现方便快捷地安装声发射传感器,使声发射传感器隐藏且非对称地稳定布置在试样表面,同时又不干扰加载和非接触表面应变测量等其他同时进行的测试项目,为复杂试验条件下的岩石力学测试创造了条件,最终试验结果也符合实际岩石力学特性。因此,利用该套声发射传感器布置装置,能有效满足试样在岩石剪切试验机上开展多种复杂测试条件下的声发射测试。
In rock acoustic emission experiment,the reasonable arrangement of acoustic emission sensors is very important.Acoustic emission sensors are usually clamped to adhere to the surface of rock samples through Vaseline.Conventional methods are complicated to operate,and exposed acoustic emission sensors and data transmission lines may interfere with other experiments and operations.In order to solve this problem,a set of installation system of acoustic emission sensors has been developed for various sample sizes.And the rock direct shear AE test and uniaxial compression AE test were carried out,which could realize the installation of AE sensors conveniently and quickly.The acoustic emission sensors are hidden and asymmetrically arranged on the surface of the sample,without affecting loading and other simultaneous tests such as non-contact surface strain measurement,which creates conditions for rock mechanics test under complex test conditions,and the final test results also conform to the actual rock mechanical properties.Therefore,using the acoustic emission sensor placement device can effectively meet the requirements of acoustic emission tests under various complex testing conditions on rock shear testing machine.
作者
肖坤
张朝鹏
刘洋
艾婷
李安强
任利
张茹
覃黎
XIAO Kun;ZHANG Zhaopeng;LIU Yang;AI Ting;LI Anqiang;REN Li;ZHANG Ru;QIN Li(College of Hydraulic and Hydropower Engineering,Sichuan University,Chengdu 610065,China;MOE Key Laboratory of Underground Science and Engineering,Sichuan University,Chengdu 610065,China;School of Architecture and Environment,Sichuan University,Chengdu 610065,China;Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610081,China)
出处
《实验科学与技术》
2021年第1期140-144,154,共6页
Experiment Science and Technology
基金
四川省科技计划项目(2019YFG0047)
中铁二院研究开发项目(KYY2019003)
四川省青年科技创新研究团队资助项目(2017TD0007)。
关键词
声发射
传感器
传感器布置
岩石剪切试验机
acoustic emission
sensor
sensor arrangement
rock shear testing machine