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一种新的预测方法,用于曲的峰值切削力,考虑到石质学公差
Mingyu Duan1, Lefei Shao1, Yizhe Huang1,2
1State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
Scientific reports
|August 10, 2024
概括
这项研究引入了一种新的3D方法来计算形采石接触,准确地预测各种岩石类型的峰值切削力 (PCF). 与现有方法相比,增强的模型显示出更高的精度和石质学容忍度.
科学领域:
- 地质技术工程 地质技术工程
- 岩石机械学 岩石机械学
- 采矿工程 采矿工程 采矿工程
背景情况:
- 精确预测峰值切削力 (PCF) 对于高效的岩石挖掘至关重要.
- 现有的模型往往缺乏石学耐受性和预测准确性.
- 圆形被广泛用于采矿和土木工程.
研究的目的:
- 开发一种高精度且具有石质耐受性的3D采石接触计算方法,用于形采石.
- 为了提高峰值切削力 (PCF) 的预测.
- 分析岩石裂变和裂传播的能量动态.
主要方法:
- 一种基于投射形状方法和D. L. Sikarskie应力分布函数的3D岩接触计算方法.
- 格里菲斯理论与岩石损伤构成模型的整合.
- 建议使用能量校正函数 (C-Kf) 来计算损伤强度指数 (Ke),将岩石脆性与弹性-塑料能量联系起来.
主要成果:
- 拟议的方法显示了高精度和石质学容忍度.
- 对全尺寸切割试验和现有模型的验证显示出卓越的性能.
- 该模型实现了0.90404的R2,超过主流模型至少12.5%的相对改进.
- 纳入损害强度指数 (Ke) 进一步提高了预测能力.
结论:
- 开发的3D方法在预测形的峰值切削力 (PCF) 方面取得了重大进展.
- 该方法的高精度和石质学耐受性使其对各种岩石条件有价值.
- 基于能量的校正函数 (C-Kf) 通过考虑岩石损伤机制,有效地提高了预测准确性.
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