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主管单位 中华人民共和国
工业和信息化部
主办单位 哈尔滨工业大学 主编 冷劲松 国际刊号ISSN 0367-6234 国内刊号CN 23-1235/T

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引用本文:王志亮,李允忠,黄佑鹏.JH-2模型参数确定及花岗岩重复侵彻数值分析[J].哈尔滨工业大学学报,2020,52(11):127.DOI:10.11918/201905216
WANG Zhiliang,LI Yunzhong,HUANG Youpeng.Parameter determination of JH-2 model and numerical analysis of repeated penetration of granite[J].Journal of Harbin Institute of Technology,2020,52(11):127.DOI:10.11918/201905216
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JH-2模型参数确定及花岗岩重复侵彻数值分析
王志亮,李允忠,黄佑鹏
(合肥工业大学 土木与水利工程学院,合肥 230009)
摘要:
为研究重复侵彻下花岗岩靶板的动力响应,运用非线性动力分析软件AUTODYN并基于FEM-SPH耦合算法开展花岗岩的侵彻模拟.首先,通过理论分析初步确定出JH-2模型参数;然后,根据花岗岩单次侵彻实验的模拟结果对参数进行调整优化;最后,在220 m/s ≤Vs≤420 m/s弹速下,采用优化后的参数对花岗岩的重复侵彻过程进行模拟分析.结果表明:JH-2模型与拉伸断裂软化模型相耦合,能够弥补JH-2模型在描述岩石低应力区由主拉伸应力作用所产生的动力响应方面的不足;花岗岩靶板初次侵彻时形成的“锥形开坑区+隧道区”破坏模式为后续的重复稳定侵彻提供了必要条件;随冲击次数的增加,绝对侵彻深度逐渐增大而每次的相对侵彻深度则呈减小趋势,且冲击次数越多或冲击速度越高,弹体侵彻过程越稳定.此外,本文所提出相对侵彻系数概念以及基于冲击次数和弹速的重复侵彻深度的理论公式均具有一定实用价值.
关键词:  花岗岩  重复侵彻  FEM-SPH耦合  锥形漏斗  相对侵彻系数
DOI:10.11918/201905216
分类号:O385
文献标识码:A
基金项目:国家自然科学基金(U1,2)
Parameter determination of JH-2 model and numerical analysis of repeated penetration of granite
WANG Zhiliang,LI Yunzhong,HUANG Youpeng
(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)
Abstract:
To investigate the dynamic response of granite target plate under repeated penetration, the nonlinear dynamic software AUTODYN along with the FEM-SPH coupling algorithm was used to simulate granite penetration. First, JH-2 model parameters were preliminarily determined through theoretical analysis. Then, the parameters were adjusted and optimized according to the simulation results of single penetration experiment of granite. Finally, under the projectile velocity of 220 m/s≤Vs≤420 m/s, the repeated penetration of granite was simulated and analyzed by using the optimized parameters. Results show that the JH-2 model coupled with tensile fracture softening model could make up for the deficiency of the JH-2 model in describing the dynamic response of rocks in low stress zone due to the action of main tensile stress. The failure mode of “conical crater + tunnel” formed during the initial penetration of the granite target plate provided a prerequisite for the subsequent repeated and stable penetration. With increasing impact times, the absolute penetration depth gradually increased, while the relative penetration depth decreased. The higher the impact times or impact velocity was, the more stable the penetration process of the projectile was. In addition, the concept of relative penetration coefficient and the theoretical formula of repeated penetration depth based on impact times and projectile velocity were given, both of which have certain practical values.
Key words:  granite  repeated penetration  FEM-SPH coupling  conical crater  relative penetration coefficient

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