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| 基于几何迭代校正的岩土模型地应力平衡方法 |
| Geometric Iterative Correction Method for Ground Stress Balance in Geotechnical Models |
| 投稿时间：2024-09-03 修订日期：2024-10-29 |
| DOI： |
| 中文关键词: 岩土工程 地应力平衡 数值分析 ABAQUS 几何迭代校正 |
| 英文关键词:eotechnical engineering geo-stress balance numerical analysis abaqus geometric iterative correction |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 初始地应力平衡对岩土工程结构的有限元分析准确性至关重要。针对传统方法在复杂岩土模型应用的局限，本研究提出一种基于几何迭代校正的地应力平衡新方法。通过对数值模型进行静力分析计算生成初始位移场，将此位移场与初始数值模型几何节点坐标叠加修正，得到新的数值模型几何节点坐标并继续进行静力分析，滚动迭代，直至数值模型的静力分析结果中位移场满足地应力平衡要求。通过应用该方法于两个复杂岩土模型后，结果显示，新的地应力平衡方法显著减少了模型位移场，达到10-4 m以下的精度，且未改变数值模型初始应力状态，能够较好的满足复杂岩土工程领域有限元模型地应力平衡的要求。 |
| 英文摘要: |
| The initial geo-stress balance is crucial for the accuracy of finite element analysis in geotechnical engineering structures. To address the limitations of traditional methods applied to complex geological models, this study proposed a new geo-stress balance method based on geometric iterative correction. The method generated an initial displacement field through static analysis of the numerical model. This displacement field was superimposed on the initial geometric node coordinates to obtain updated coordinates, followed by further static analysis. The iterative process continued until the displacement field in the numerical model satisfied the geo-stress balance requirements. Application of this method to two complex geological models showed that the new geos-tress balance approach significantly reduced the displacement field, achieving an accuracy below 10-4 m, without altering the initial stress state of the numerical model. It effectively meets the geo-stress balance requirements for finite element models in the complex geotechnical engineering domain. |
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