| 青藏高原山地系统动力学数值模拟研究 |
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| 引用本文： | 毕思文.青藏高原山地系统动力学数值模拟研究[J].山地学报,2001,19(4):289-298. |
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| 作者姓名： | 毕思文 |
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| 作者单位： | 中国科学院 |
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| 基金项目： | 中国博士后科学基金一等资助. |
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| 摘 要： | 青藏高原山地系统地壳巨厚，约为正常地壳厚度的两倍，由于第四纪以来高原的急剧隆升而成为全球构造研究的热点，根据山地系统岩石圈运动的主要因素－构造带和断裂带，本文将青藏高原山地系统的地壳演变化简化成一个平面问题和一个典型剖面问题的力学模型，应用变形体模拟构造带，采用摩擦模型模拟断裂带，并根据周边位移情况给出边界条件，应用ABAQUS有限元分析软件和位移加载，变成了青藏高原山地系统岩石圈应力－位移场吻合较好，由此分析和推断了青藏高原山地系统演变的历史和现状。
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| 关 键 词： | 青藏高原 山地系统 数值模拟 应力 位移 系统动力学 地壳动力 |
| 文章编号： | 1008-2786(2001)04-0289-10 |
| 修稿时间： | 2001年7月6日 |
Study on Dynamic Numerical Simulation of Mountain System in Tibet Plateau |
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| BI Si,wen.Study on Dynamic Numerical Simulation of Mountain System in Tibet Plateau[J].Journal of Mountain Research,2001,19(4):289-298. |
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| Authors: | BI Si wen |
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| Abstract: | Tibet plateau in mountain system is becoming one of the focuses of global technique research, because of its marvelous thick, which is twice of the normal thickness of Mountain System in lithosphere, and its rapid raise from the Forth Epoch. By using a finite element analysis software ABAQUS, the numeric analysis has been carried out and presented in this paper for the lithosphere stress field. It is the first time to use the displacement loading in the simulation of Tibet Plateau. During the analysis, the deformed elements are used to simulate the structure band, and friction mechanism is used to model the fracture band. The boundary conditions are given according to the boundary displacements around the Plateau. The stress and displacement distributions are obtained for the geological evolution of the plateau, which are consistent with P axial orientations of the seismic origin mechanism and the measured principle stress orientations. The analysis is also given for the dynamic lithosphere evolution of Mountain System in Tibet Plateau. |
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| Keywords: | Tibet Plateau mountain system numerical simulation stress displacement |
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