相关实验视频
Updated: Jul 28, 2025

09:17
Surrogate Model Development for Digital Experiments in Welding
Published on: March 28, 2025
1.1K
基于B-正常模型的采矿表面任何点的移位和变形的动态预测
Xinming Ding1,2, Keming Yang3, Cheng Zhang4
1School of Earth Science and Mapping Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China.
概括
一个新的B-正常模型使用博尔兹曼函数和粒子群优化准确预测采矿沉降和表面变形. 这种动态预测系统提高了采矿区的安全和环境保护.
科学领域:
- 地质技术工程 地质技术工程
- 采矿工程 采矿工程 采矿工程
- 环境科学 环境科学
背景情况:
- 煤炭开采导致地表沉降和变形,影响地下岩石结构,生态系统和安全.
- 现有的概率积分模型在范围,预测效果和准确性方面存在局限性,特别是在移动盆地边缘.
- 准确和有效的矿山沉降动态预测对于减轻风险至关重要.
研究的目的:
- 开发一种新,准确和高效的动态预测模型,用于煤矿开采造成的表面移位和变形.
- 通过提出B-正常预测模型来解决传统模型的局限性.
- 为了验证模型的性能,使用来自煤矿的真实数据.
主要方法:
- 基于博尔茨曼函数提出了一个新的采矿沉降预测模型.
- 集成了一个转换的正常分布时间函数来创建B-正常预测模型.
- 采用粒子群优化混青跳跃算法 (PSO-SFLA) 实现全局最佳参数反转.
- 应用该模型来预测古北煤矿8102工作面的沉降,倾斜,曲率,水平移位和变形.
主要成果:
- B-normal模型实现了动态沉降和水平移位预测的厘米级准确度.
- 动态倾斜和水平变形的根平均平方误差 (RMSE) 低于0.51mm/m.
- 动态曲率预测的RMSE在0.020mm/m2.2以内.
- 该模型成功地反映了表面移位和变形的动态进化规律.
结论:
- B-normal动态预测模型在预测采矿引起的表面变化方面具有很高的可靠性和准确性.
- 该模型有效地捕捉了表面移位和变形的动态演变.
- 开发的模型满足了采矿领域工程应用的实际需求.
- 这种方法比传统的预测方法有了显著的改进.
相关概念视频
Deformation of Member under Multiple Loadings
197
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
197
Deformations in a Symmetric Member in Bending
245
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
245
Bending of Curved Members - Strain Analysis
164
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
The important part of bending analysis for such a member...
164
Bending of Curved Members - Neutral Surface
205
In curved beams, unlike straight beams, the stress distribution across the cross-section is not uniform due to the beam's curvature. This non-uniformity arises because the neutral axis, where stress is zero, does not align with the centroid of the section. In a curved beam, the strain varies along the section as a function of the distance from the neutral axis.
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within...
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within...
205
Temperature Dependent Deformation
174
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
174
Normal Strain under Axial Loading
586
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
586

