| 地震过程中形变能的演化特征 |
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| 引用本文： | 张永志.地震过程中形变能的演化特征[J].地震研究,1994,17(2):171-176. |
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| 作者姓名： | 张永志 |
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| 作者单位： | 国家地震局第二地形变监测中心 |
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| 摘 要： | 本文利用非线性理论分析了震前形变能随时间的演化关系，导出了应力与应变的本构关系为非线性时的突变演化模型。最后利用青海门源６．４级地震前后的跨断层形变资料，计算了非线性形变的演化过程。取得如下认识：１．震前形变能的演化过程是不稳定过程；２．形变能的突变发生在非平衡区；３．门源地震前后的跨断层地形变资料的计算结果与理论分析基本一致。
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| 关 键 词： | 地震前兆 应变能 演化 非线性理论 |
EVOLUTION CHARACTERISTICS OF DEFORMATION ENERGY IN PROCESS OF AN EARTHQUAKE |
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| Zhang Yongzhi.EVOLUTION CHARACTERISTICS OF DEFORMATION ENERGY IN PROCESS OF AN EARTHQUAKE[J].Journal of Seismological Research,1994,17(2):171-176. |
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| Authors: | Zhang Yongzhi |
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| Abstract: | In this paper,we apply the nonlinear theory to study the characteristics of elastic energy in deformation evolution before an earthquake when the relationship between stress and strain is nonlinear,from which a evolution model has been derived.Finally,evolution process of nonlinear deformation has been calculated from the data observed across faults before and after Menyuan M=6.4 earthquake in Qinghai.The following results are obtained,1.The evolution process of deformation energy before an earthquake is unstable;2.Sudden changes of deformation energy occur in unbalanced area;3.Calculted and theoretical results from the data observed across faults before and after Menyuan earthquake arc basically identical. |
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| Keywords: | Strain energy Stress-strain relation Mutation Nonlinear theory |
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