论文成果
Analysis and numerical simulation for resonant response of bottom hole rock
摘要:Resonance drilling is a new drilling speed raising technology. It is crucial to make impact frequency match rock's resonant frequencies under different conditions to achieve the best rock-breaking efficiency in drilling process. Therefore, it is necessary to study resonant response of bottom hole rock under confining pressure and constraint conditions. Here, considering bottom hole rock internal pore structure and rock subjected to bottom hole confining pressure, through theoretical analysis and numerical simulation, relations between rock displacement response amplitude and impact frequency were obtained under different constraints and different pore distributions, and then rock's resonant frequencies were acquired. It was shown that under simulation conditions here, rock's resonant frequencies don't change with variation of confining pressure, but they are slightly higher than those under the free condition; when bottom hole rock is constrained along radial displacement, its resonant frequencies become higher, and they increase with increase in rock's Poisson's ratio; when pore in rock distributes uniformly along impact direction, rock's resonant frequencies are not related to porosity; when pore in rock distributes unevenly along impact direction, rock's resonant frequencies are related to uneven degree of pore distribution, the higher the uneven degree, the lower the rock's resonant frequencies. The study results provided a preliminary theoretical basis for analyzing rock's resonance response characteristics under the condition of bottom hole, and provided a basis for choosing parameters of the resonance drilling technology.
© 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
ISSN号:1000-3835
卷、期、页:v 38,n 5,p13-20
发表日期:2019-03-15
期刊分区(SCI为中科院分区):无
收录情况:EI(工程索引)
发表期刊名称:Zhendong yu Chongji/Journal of Vibration and Shock
通讯作者:宋恒宇
第一作者:李根生,史怀忠,黄中伟,宋先知,杨睿月
论文类型:期刊论文
论文概要:宋恒宇,李根生,史怀忠,黄中伟,宋先知,杨睿月,Analysis and numerical simulation for resonant response of bottom hole rock,Zhendong yu Chongji/Journal of Vibration and Shock,2019,v 38,n 5,p13-20
论文题目:Analysis and numerical simulation for resonant response of bottom hole rock