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基于离散元素方法对煤岩参数校准的研究

Yadong Wang^1,2, Guocong Lin³, Xunan Liu^1,2

¹School of Mechanical Engineering, Liaoning Technical University, Fuxin, 123000, China.

Scientific reports

|November 3, 2024

概括

这项研究对煤墙的离散元素模型进行校准,改进了采矿设备的虚拟模拟. 精确的模型提高了采矿机械的性能分析和智能控制.

科学领域:

* 采矿工程采矿工程
* 计算力学计算力学
* 材料科学材料科学

背景情况:

*精确模拟煤炭切割需要精确的煤炭墙壁离散元件模型 (DEM).
*采矿设备的虚拟原型需要可靠的煤炭和岩石相互作用模型.

研究的目的:

* 开发精确的煤墙离散元素模型,模拟采矿设备切割过程.
* 为了最大限度地减少模拟和测量煤壁性能之间的误差,例如包装角度和压力强度.
*通过模拟和物理实验验证校准模型.

主要方法:

*煤岩包装和单轴压缩试验,以获得材料性能.
* 实验设计 (DOE) 包括Plackett-Burman,最的登和Box-Behnken实验进行参数校准.
* 开发一种双向合模型 (EDEM-RecurDyn) 来模拟煤切割器与煤壁的相互作用.
*使用时间域和频域分析验证振动信号.

主要成果:

*优化的DEM参数实现了较低的相对误差:包装角度为2.9%,压力强度为5.0%.
*虚拟模拟的误差是最小的:时间域的4.19%和频域振动信号的3.75%.
* 校准的离散元素煤墙模型准确地代表了实际的煤和岩石特性.

结论:

* 拟议的校准方法是可行的,并为离散元素煤墙模型提供准确的结果.
* 经过验证的模型准确地模拟了采矿机械和煤炭之间的相互作用.
*这种方法为采矿设备性能分析和智能控制提供了一种安全,高效和具有成本效益的方法.

关键词:

积累角度的积累角度是什么一个离散的元素煤墙壁.埃德姆 (EDEM) 是一个电子游戏.实验验证实验验证的验证参数校准参数的校准.单轴压缩是一种单轴压缩.

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