摘要
设计了一个改进的单断层地震孕育过程细胞自动机（ＣＡ）模型，通过设计外界通过 施加应力与模型间进行的能量交换和模型的细胞之间存在的非线性力学作用，试图理解地震 活动特性的力学机制．与早期细胞自动机模型相比，改进了参数的取值方式，将摩擦时间依 从的理论引进模型，使该细胞自动机模型更接近实际的孕震系统．研究表明参数取值方式对 人工地震序列和各细胞破裂事件的非均匀时间特性有重要影响，较小震级和较大震级范围中 的事件分别遵从明显不同的累积频度一震级关系．
An improved cellular automation model (CA) was designed for seismic generating process in a single fault. Designing an energy exchange between the circumstance and the model by loading and considering nonlinear interaction among the cells of the model, we tried to understand the mechanism of seismic characteristics. Comparison of present results with the previous cellular automation models shows that the cellular automation model in this paper is much close to nature seismic generating system owing to the improvement of sampling and the introduction of time-dependent frictional mechanism. The results indicate that the sampling method is important for the temporal heterogeneous feature of the man-made catalog and each cells breaking, and that the events with small and large magnitude obey quite different magnitude-frequency relationship.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第2期203-212,共10页
Chinese Journal of Geophysics
基金
中国地震局"九五"地震科研重点项目!9504030303
国家重点基础研究项目!G1998040704
关键词
摩擦时间
地震活动性
细胞自动机模型
震级
Cellular automation, Time-dependent frictional mechanism, Exponential stochastic sample, Heterogeneous temporal seismic feature.
