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首页> 外文期刊>International Journal for Numerical and Analytical Methods in Geomechanics >A continuum mechanics based framework for optimizing boundary and finite element meshes associated with underground excavations --accuracy, efficiency and applications
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A continuum mechanics based framework for optimizing boundary and finite element meshes associated with underground excavations --accuracy, efficiency and applications

机译：基于连续力学的框架，用于优化与地下挖掘相关的边界和有限元网格-准确性，效率和应用

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摘要

A framework was developed to address the automatic optimization of the level of geometric detail required for stress analysis of underground excavations in mining, which was presented in the companion paper. The motivation for optimizing the mesh geometry stems from the over-discretization of computational domain as the digital mine model is built while our knowledge of some of the input parameters is quite limited. Thus, the accuracy of the solution is not expected to be increased with a finely discretized mesh, only the computation time does. Therefore, it is acceptable if the results obtained from an optimized model have accuracy comparable to the uncertainty in input data (e.g. rock mass properties, geology, etc.). Although the mesh optimization framework automates the geometry optimization and reduces computation time, the accuracy of the solution from the resulting geometry must be evaluated to ensure the quality of the solution at the 'region of interest'. Both a priori (mesh quality) and a posteriori (solution quality) measures are employed along with recording the mesh optimization time. Finally, the applicability of the mesh optimization framework is demonstrated by analysing a number of mining and civil engineering underground models.
机译：开发了一个框架来解决采矿中地下挖掘的应力分析所需的几何细节水平的自动优化，该框架已在随附的论文中提出。优化网格几何形状的动机来自建立数字矿井模型时计算域的过度离散化，而我们对某些输入参数的了解却非常有限。因此，仅使用计算时间，就不会期望使用精细离散的网格提高解的精度。因此，如果从优化模型获得的结果具有与输入数据的不确定性（例如岩体属性，地质等）相当的精度，这是可以接受的。尽管网格优化框架可自动进行几何优化，并减少了计算时间，但必须评估所得几何的解的准确性，以确保“关注区域”的解质量。先验（网格质量）和后验（解决方案质量）度量均与记录网格优化时间一起使用。最后，通过分析许多采矿和土木工程地下模型，证明了网格优化框架的适用性。

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