中南大学学报（自然科学版）2026，Vol.57Issue(2)：760-770,11.DOI:10.11817/j.issn.1672-7207.2026.02.022
山地冰川冰下基岩取样用回转冲击式超声波钻
Rotary-percussive ultrasonic drill for subglacial bedrock sampling in mountain glaciers
摘要
Abstract
To meet the requirements of subglacial bedrock coring in high-altitude mountain-glacier environments,a rotary-percussive ultrasonic drill driven by piezoelectric actuation was proposed in this study.Firstly,a half-wavelength piezoelectric transducer was designed based on piezoelectric vibration theory and it was validated through modal and harmonic response analyses.Secondly,a prototype drill with a total mass of only 11.15 kg was developed.Finally,drilling experiments on limestone with a uniaxial compressive strength of 55 MPa were conducted.The effects of duty cycle,time interval,weight on bit,and drill-bit type on drilling performance were systematically investigated. The results show that,at the same rotational speed,the introduction of percussiveaction increases the penetration rate by 58.6％,accompanied by a significant increase in rock-chip size. Higherduty cycle,shorter time interval,and larger weight on bit lead to a higher penetration rate. Under a force on bit of107.76 N,a drilling depth of 32 mm can be achieved by a carbide drill bit within 20 min with a powerconsumption of only 158 W,exhibiting a significantly higher drilling rate than that of a diamond drill bit.关键词
山地冰川/冰下基岩/取样/回转冲击/压电换能器Key words
mountain glaciers/subglacial bedrock/sampling/rotary-percussive/piezoelectric transducer分类
信息技术与安全科学引用本文复制引用
来兴文,李冰,徐良,李亚洲,刘泽君..山地冰川冰下基岩取样用回转冲击式超声波钻[J].中南大学学报（自然科学版）,2026,57(2):760-770,11.基金项目
中央高校基本科研业务费专项资金资助项目(590223008)(Project(590223008)supported by the Fundamental Research Funds for the Central Universities) （590223008）
