研究论文

振动点载荷试验仪的设计

  • 周子龙 ,
  • 吴志波 ,
  • 赵云龙
展开
  • 中南大学资源与安全工程学院, 长沙 410083
周子龙,教授,研究方向为岩石力学及岩土工程灾害防治,电子信箱:zlzhou@mail.csu.edu.cn;吴志波(共同第一作者),硕士研究生,研究方向为疲劳力学,电子信箱:wushuwei@csu.edu.cn

收稿日期: 2013-11-06

  修回日期: 2014-05-05

  网络出版日期: 2014-07-02

基金资助

国家自然科学基金优秀青年科学基金项目(51322403);湖南省科技计划重点项目(2013SK2011)

The Design of Vibration Point Load Tester

  • ZHOU Zilong ,
  • WU Zhibo ,
  • ZHAO Yunlong
Expand
  • School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Received date: 2013-11-06

  Revised date: 2014-05-05

  Online published: 2014-07-02

摘要

为了更加科学地研究点载荷循环加载下不同振动频率、激振力对岩石等材料力学性质的影响,提出一种振动点载荷试验仪设计方法。振动点载荷试验仪的支架底部平台上设置了静压加载装置,支架顶部平台上设置了特制的振动电机,竖向设置的上加压锥与振动电机底部铸造成一体,下加压锥与静压加载装置上部的加压活塞相连并可通过隔板中心孔随之上下运动,上加压锥与下加压锥之间放置试件。通过调整振动电机的偏心块夹角及转速,分别得到不同的激振力及振动频率,可测试出试件在不同激振力、振动频率下的点载荷强度及破坏所需时间,进而通过绘图分析可得到使破岩效率最佳且对掘进机截齿损害最小的振动频率与激振力组合。

本文引用格式

周子龙 , 吴志波 , 赵云龙 . 振动点载荷试验仪的设计[J]. 科技导报, 2014 , 32(18) : 31 -35 . DOI: 10.3981/j.issn.1000-7857.2014.18.004

Abstract

A vibration point load tester is designed in this paper, for studying the mechanical properties of rock subjected to a cyclic point load, with different vibration frequencies and excitiong forces. The instrument consists of a static loading unit and a vibration loading unit. The former is a hydrostatic pressure device fixed on the bottom platform of the bracket. And the latter is a special vibration motor, installed on the top platform of the bracket. The upper loading cone and the special vibration motor are cast as a whole. The lower loading cone is connected with the upper pressurized piston of the hydrostatic pressure device, and can move up and down through the diaphragm hole. Different excitiong forces and frequencies can be assigned by adjusting the eccentric block's angle and the motor speed, then the point load and the acting time for reaching the failure point of the rock body under a given excitiong force and frequency can be determined. And the best combination of the vibration frequency and the excitiong force, with the best rock fragmentation efficiency and the least harm to boring machine cutters, can be obtained.

参考文献

[1] 李夕兵, 姚金蕊, 杜坤. 高地应力硬岩矿山诱导致裂非爆连续开采初 探——以开阳磷矿为例[J]. 岩石力学与工程学报, 2013, 32(6): 1101-1111. Li Xibing, Yao Jinrui, Du Kun. Preliminary study for induced fracture and non-explosive continuous mining in high-geostress hard rock mine: A case study of kaiyang phosphate mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(6):1101-1111.
[2] 葛修润, 卢应发. 循环荷载作用下岩石疲劳破坏和不可逆变形问题的 探讨[J]. 岩土工程学报, 1992, 14(3): 56-60. Ge Xiurun, Lu Yingfa. Discussion on fatigue failure and irreversible deformation of rock under cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 1992, 14(3): 56-60.
[3] 葛修润, 蒋宇, 卢允德, 等. 周期荷载作用下岩石疲劳变形特性试验研 究[J]. 岩石力学与工程学报, 2003, 22(10): 1581-1585. Ge Xiurun, Jiang Yu, Lu Yunde, et al. Testing study on fatigue deformation law of rock under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(10): 1581-1585.
[4] 蒋宇, 葛修润, 任建喜. 岩石疲劳破坏过程中的变形规律及声发射特 性[J]. 岩石力学与工程学报, 2004, 23(11): 1810-1814. Jiang Yu, Ge Xiurun, Ren Jianxi. Deformation rules and acoustic emission characteristics of rocks in process of fatigue failure[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(11): 1810-1814.
[5] 章清叙, 葛修润, 黄铭, 等. 周期荷载作用下红砂岩三轴疲劳变形特性 试验研究[J]. 岩石力学与工程学报, 2006, 25(3): 473-478. Zhang Qingxu, Ge Xiurun, Huang Ming, et al. Testing study on fatigue deformation law of red-sandstone under triaxial compression with cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2006(3): 473-478.
[6] Ray S K, Sarkar M, Singh T N. Effect of cyclic loading and strain rate on the mechanical behaviour of sandstone[J]. International Journal of Rock Mechanics and Mining Sciences, 1999, 36(4): 543-549.
[7] Bagde M N, Petroš V. Waveform effect on fatigue properties of intact sandstone in uniaxial cyclical loading[J]. Rock Mechanics and Rock Engineering, 2005, 38(3): 169-196.
[8] Bagde M N, Petroš V. The effect of machine behaviour and mechanical properties of intact sandstone under static and dynamic uniaxial cyclic loading[J]. Rock Mechanics and Rock Engineering, 2005, 38(1): 59-67.
[9] Bagde M N, Petroš V. Fatigue properties of intact sandstone samples subjected to dynamic uniaxial cyclical loading[J]. International Journal of Rock Mechanics and Mining Sciences, 2005, 42(2): 237-250.
[10] Tao Z Y, Mo H L. An experimental study and analysis of the behaviour of rock under cyclic loading[C]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1990, 27 (1): 51-56.
[11] Burdine N T. Rock failure under dynamic loading conditions[J]. Society of Petroleum Engineers Journal, 1963, 3(1): 1-8.
[12] Haimson B C. Mechanical behaviour of rock under cyclic loading: 9F, 1T, 11R[C]. 3rd Congress ISRM, Denver Colorado, September 1-7, 1974.
[13] 朱成顺. 快速测量砖强度的点载荷仪: 中国, 86202432[P]. 1987-07-15. Zhu Chengshun. Fast measurement point load strength meter brick: China, 86202432[P]. 1987-07-15.
[14] Franklin J A. Suggested method for determining point load strength[C]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1985, 22(2): 51-60.
文章导航

/