工程科学学报2017，Vol.39Issue(1)：141-146,6.DOI:10.13374/j.issn2095-9389.2017.01.018
应用激光多普勒测振仪的岩块体累计损伤评价试验研究
Experimental study on cumulative damage assessment of rock-block using a laser Doppler vibrometer
摘要
Abstract
Rock-block collapse has been a hot issue in the study of geological hazards for many years,and it is difficult to prevent because of its sudden disintegration,which is a serious threaten to human life and property safety.Rock-block collapse is caused by dynamic failure derived from system instability,so it can be more effective to apply vibration characteristic parameters in damage assessment and early warning.By using a laser Doppler vibrometer,the cohesion damage of control fissure was analyzed by natural vibration frequency in the paper.Based on the modified limit equilibrium model,the safety factor of the block with a deteriorating structural plane was calculated by the frequency,which decreased from 1.17 to 1.04,in accordance with the reality.The results show that the natural vibration frequency can effectively identify the unstable rock cumulative damage and provide objective data for reasonable determination of the cohesion.The laser Doppler vibrometer technology based on natural vibration frequency can satisfy cumulative damage evaluation of unstable rocks.It will play a significant role in engineering applications in the future.关键词
岩石力学/损伤评价/激光多普勒测振仪/固有振动频率/黏结力Key words
rock mechanics/damage assessment/laser Doppler vibrometers/natural vibration frequency/cohesion分类
建筑与水利引用本文复制引用
杜岩,谢谟文,蒋宇静,宋红克,李博,刘日成..应用激光多普勒测振仪的岩块体累计损伤评价试验研究[J].工程科学学报,2017,39(1):141-146,6.基金项目
国家自然科学基金资助项目(41572274,41372370) （41572274,41372370）
中国博士后科学基金资助项目(2016M591078) （2016M591078）
中央高校基本科研业务费资助项目(FRF-TP-16-014A1) （FRF-TP-16-014A1）
北京科技大学“创新人才培养”项目(USTB201309FX) （USTB201309FX）
浙江省山体地质灾害防治协同创新中心开放基金课题(PCMGH-2016-Y-02) （PCMGH-2016-Y-02）
