岩石动态扰动伺服三轴试验系统的研制与应用

发布时间：2019-06-22 20:22

【摘要】：详细地介绍了自行研制的岩石动态扰动伺服三轴试验系统,该试验系统具有在常规三轴试验的同时进行动态扰动的功能。试验系统主要由轴向加载系统、围压加载系统、动态扰动加载系统和数据采集系统构成,试验系统能达到的最大轴向荷载为2000kN,最大围压为70MPa,所能施加的最大扰动荷载为300kN,扰动荷载的最高频率可达到70Hz。运用所研制的试验系统,对大理岩进行了一组单轴压缩过程中的动态扰动试验。试验结果表明:当扰动荷载频率相同时,振幅越大,扰动至岩样破坏时经历的时间越短;反之,振幅越小,扰动至破坏时经历的时间越长。从破坏模式来看,扰动力作用下大理岩破坏较为散碎,扰动荷载振幅越小,散碎程度越高。试验机系统稳定、可靠性较高,该试验系统值得在进行深部岩石力学性质研究中推广应用。
[Abstract]:A self-developed rock dynamic disturbance servo triaxial test system is introduced in detail. The test system has the function of dynamic disturbance while conventional triaxial test. The test system is mainly composed of axial loading system, confining loading system, dynamic disturbance loading system and data acquisition system. The maximum axial load can be achieved by the test system is 2000kN, the maximum confining pressure is 70MPA, the maximum disturbance load can be applied to 300kN, and the maximum frequency of disturbance load can reach 70Hz. A group of dynamic disturbance tests of marble during uniaxial compression are carried out by using the developed test system. The experimental results show that when the frequency of disturbance load is the same, the larger the amplitude is, the shorter the time of disturbance to rock sample failure is, on the contrary, the smaller the amplitude is, the longer the time from disturbance to failure is. From the point of view of failure mode, the damage of marble under disturbance force is more scattered, and the smaller the amplitude of disturbance load is, the higher the degree of fragmentation is. The testing machine system is stable and reliable, so the test system is worth popularizing and applying in the study of deep rock mechanical properties.
【作者单位】：华侨大学福建省隧道与城市地下空间工程技术研究中心;黑龙江科技大学矿业工程学院;
【基金】：国家自然科学基金项目(No.51679093,No.51374112) 福建省高校新世纪优秀人才支持计划项目中国博士后科学基金资助项目(No.2014M551290) 黑龙江省博士后科学基金资助项目(No.LBH-Z13208)~~
【分类号】：TU45

【相似文献】