摘要
[目的]为研究冲击器冲击岩石过程的冲击性能及冲击力分布情况,对不同建模尺寸和岩石材料特性对冲击力分布的影响进行分析。[方法]通过ANSYSLS/DYNA软件建立岩石冲击过程数值仿真模型,分析Holmquist-Johnson-Cook(HJC)本构损伤准则条件下岩石材料特性。[结果]当孔深度t_(hole)从0增加到10.854 mm时,最大冲击力F_(ltmax)分布范围为58.941~256.699 kN,且在thole为5.2 mm出现最大峰值。无初始孔条件下,基于不同参考文献的岩石材料模型下的最大冲击力F_(ltmax)范围为124.606~256.575 kN,相对于韩东波文献材料特性值(197.442 kN)的变化率为-36.89%~29.95%。带初始孔条件下(t_(hole)为10.854 mm),最大冲击力F_(ltmax)范围为91.546~156.208 kN,相对于韩东波文献材料特性值(133.97 kN)的变化率为-33.82%~12.92%。[结论]分析结果表明,孔深度的变化和材料特性的不同对冲击力的影响显著,可为冲击器设计与钻孔工艺优化提供定量参考。
[Purposes]To study the impact performance and impact force distribution of the impactor during rock impacting process,the influence of different modeling dimensions and rock material properties on the impact force distribution was analyzed.[Methods]A numerical simulation model of the rock impacting process was established using ANSYS LS/DYNA software to analyze rock material characteristics under the Holmquist-Johnson-Cook(HJC)constitutive damage criterion.[Findings]When the hole depth thole increases from 0 to 10.854 mm,the maximum impact force F_(1tmax) ranges from 58.941 kN to 256.699 kN,and reaches its peak at thole of 5.2 mm.Under the condition without initial hole,the maximum impact force F1tmax of rock material models based on different references ranges from 124.606 kN to 256.575 kN,with a change rate of-36.89%to 29.95%relative to the material property value(197.442 kN)from Han Dongbo's literature.Under the condition with initial hole(thole of 10.854 mm),the maximum impact force F_(1tmax) ranges from 91.546 kN to 156.208 kN,with a change rate of-33.82%to 12.92%relative to the material property value(133.97 kN)from Han Dongbo's literature.[Conclusions]The results indicate that variations in hole depth and differences in material properties significantly affect the impact force,which can provide quantitative reference for impactor design and drilling process optimization.
作者
李东方
林海斌
周明安
祝惠一
傅文涛
LI Dongfang;LIN Haibin;ZHOU Ming'an;ZHU Huiyi;FU Wentao(School of Mechanical and Electrical Engineering,Quzhou College of Technology,Quzhou 324000,China;Quzhou Institute of Metrology Quality Inspection,Quzhou 324000,China)
出处
《河南科技》
2026年第3期20-24,共5页
Henan Science and Technology
基金
衢州市科技攻关竞争性项目(2025K252、2023K266)
浙江省教育厅一般科研项目(Y202455816)
衢州职业技术学院校级科研创新团队项目(XKCTD202206)
衢州职业技术学院新一批校级研究所(中心)项目(QZYJS202107)。
