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| 基于SiPESC.FEMS的隧道施工数值模拟构架 |
| Numerical Simulation Framework for Tunnel Construction Based on SiPESC.FEMS |
| 投稿时间：2019-09-19 修订日期：2019-10-15 |
| DOI： |
| 中文关键词: 隧道施工数值模拟 弹塑性分析 生死单元 埋入单元 SiPESC.FEMS |
| 英文关键词: tunnel construction numerical simulation elasto-plastic analysis birth-death element embedded element SiPESC.FEMS |
| 基金项目:国家重点研发计划项目(2016YFB0200702)；国家自然科学基金项目(11761131005)；辽宁省自然科学基金项目(2019-ZD-0021) |
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| 中文摘要: |
| 基于开放式结构有限元分析软件系统SiPESC.FEMS及其弹塑性分析构架，结合隧道结构常用的地层结构模型的理论思想和技术，实现了一种隧道施工有限元分析计算构架。该构架通过地应力平衡分析计算围岩的初始应力，利用SiPESC.FEMS弹塑性分析功能，实现地应力平衡多步序分析所需的加载和卸载过程。利用SiPESC.FEMS对单元和材料属性的数据灵活管理，实现生死单元技术。利用SiPESC.FEMS对多种单元和多点约束的支持，实现埋入单元技术。利用SiPESC.FEMS动态任务流程配置，搭建了多分析步隧道施工计算流程。数值验证表明，该构架适用隧道施工过程的数值模拟，能有效地计算出地应力平衡过程的应力变化，给出最优的隧道施工方案。 |
| 英文摘要: |
| Based on the open system of finite element analysis software SiPESC.FEMS and its elastic-plastic analysis framework, a new finite element analysis algorithm framework for the tunnel construction is realized with the commonly used stratum structure model theory and related technologies. In this framework, the initial stress of the rock is calculated by geostatic equilibrium analysis. The loading and unloading process required in multi-steps analysis for stress balancing is implemented by using elasto-plastic analysis in SiPESC.FEMS. The technology of birth-death element is realized benefiting from the flexible management of elements and properties in SiPESC.FEMS. The technology of embedded element is achieved by the employment of MPC, and the task flow of multi-steps analysis in tunnel construction is constructed by the configuration of dynamic task flow from SiPESC.FEMS. Numerical examples show that the new framework is suitable for the numerical simulation of tunnel construction process and that it can be used to calculate the stress change in the process of stress balancing effectively and to obtain the optimal tunnel construction scheme in tunnel construction. |
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