| 地质力学磁力模型试验磁场梯度研究 |
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| 引用本文： | 唐凯,罗先启,张振华. 地质力学磁力模型试验磁场梯度研究[J]. 三峡大学学报(自然科学版), 2010, 32(1): 56-58,74 |
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| 作者姓名： | 唐凯 罗先启 张振华 |
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| 作者单位： | 三峡大学,三峡库区地质灾害教育部重点实验室,湖北,宜昌,443002 |
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| 基金项目： | 2006年国家自然科学基金资助项目 |
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| 摘 要： | 地质力学磁力模型试验与离心机模型试验的核心思想类似,都是通过施加外加力场来达到增加试验材料应力水平的目的.本文根据磁性颗粒的磁场力公式,指出磁场梯度为恒定值是磁性材料受力均匀的必要条件之一.根据磁滞回试验测得的磁性材料的磁化强度,推导获得了均匀力场的磁场梯度下限值.采用数值模拟方法,计算了单圆台线圈、两同向电流对接线圈、两反向电流对接线圈这3种磁场生成方案的磁场梯度,比较分析该3种磁场梯度的均匀性,研究表明单线圈磁场生成方案所产生的磁场梯度较均匀且磁场空间较大,因此选择单线圈为磁力模型试验的磁场生成方案.
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| 关 键 词： | 模型试验 磁力 磁场强度梯度 磁化强度 |
Study of Magnetic Field Gradient in Geomechanical Model Test |
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| Tang Kai,Luo Xianqi,Zhang Zhenhua. Study of Magnetic Field Gradient in Geomechanical Model Test[J]. Journal of China Three Gorges University(Natural Sciences), 2010, 32(1): 56-58,74 |
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| Authors: | Tang Kai Luo Xianqi Zhang Zhenhua |
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| Affiliation: | Tang Kai Luo Xianqi Zhang Zhenhua(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Education Ministry,China Three Gorges Univ.,Yichang 443002,China) |
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| Abstract: | Geomechanical model test based on electromagnetic force is a method that utilizes external force field to increase the stress level of the test materials as similar as the centrifugal model test.This paper focuses on the magnetic field gradient which is a dominant factor in the magnetic force formula of the magnetic materials in magnetic field,presenting the constant value requirements and the MFG lower limit which is calculated according to the magnetization measured in the hysteresis loop tests.The unifor... |
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| Keywords: | model test magnetic force magnetic field gradient magnetization intensity |
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