在不同的工作条件和结构参数下对气动冲击器的钻孔力进行数值分析
Dongfang Li1, Lianghuai Tong2, Zengyang Huang3
1School of Mechanical and Electrical Engineering, Quzhou College of Technology, Quzhou, 324000, China. ldf_keer@163.com.
Scientific reports
|September 29, 2025
概括
这项研究通过使用有限元法 (FEM) 分析冲击力来优化下孔 (DTH) 钻探. 优化钻头插入角大大降低了峰值冲击力,以实现高效的硬岩钻.
科学领域:
- 机械工程 机械工程
- 地质技术工程 地质技术工程
- 计算力学 计算力学 计算力学
背景情况:
- 下洞 (DTH) 钻探对于硬岩石开采至关重要.
- 了解冲击力是优化DTH子性能和寿命的关键.
- 现有的模型往往缺乏在岩石破裂过程中应力分布的详细分析.
研究的目的:
- 使用有限元法 (FEM) 进行DTH钻井中的冲击力数值分析.
- 调查钻头配置,操作参数和岩石表面几何学对冲击力的影响.
- 为优化 DTH 子设计和操作得出实证解决方案.
主要方法:
- 使用霍姆奎斯特-约翰逊-库克 (HJC) 构成标准建模了一个80型气动钻机.
- 使用INVENTOR进行了三维机械设计.
- 使用ANSYS LS-DYNA与APDL参数编程进行了非线性动态模拟.
- 系统地分析了岩石破裂过程中的应力分布.
主要成果:
- 数值结果被调整为推导经验解决方案,最大相对误差在 -9.40%至8.23%之间.
- 优化钻头插入的分布角度 (α) 从25°到0°,将峰值冲击力最小化至200.65 kN (比1.291).
- 预钻钻孔的过渡角度 (γ) 显著影响力分布模式.
结论:
- 该研究为优化DTH机械设计提供了关键的理论见解.
- 这些发现使得对高效的硬岩钻探进行了增强的操作参数选择.
- 优化的钻头和钻孔几何结构可以减少冲击力和提高钻井效率.
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