Abstract:

Acom puter sim ulation system of earthquakes was established with mass-spring model．After a series of testing with various models,distribution of slip resistance in a fault segment wasfound to play an importent part during the fault slip process.Basd on the concept of 'Resistances-Uniformizing',suggested by Wan Shengzhu from rock experiment,the 'Resistanc-homogeneous fault segment' was recommended to describe the fault segment with homogeneous resistance during fault slip．The most important for a large earthquake is not the magnitude of faultstrengh,but the length of a Resistance-homogeneous segment.

Key words: seismic simulation, Fault segment, Fault instability, Frictional law, Resistance-homogeneous

摘要：

运用滑块模型建立了一个地震活动的计算机模拟系统。对地震活动计算机模型进行反复试验,认识到断层失稳过程中摩擦强度分布的重要性。把在断层滑动中摩擦阻力分布比较均匀的段称为匀阻段。对大地震而言,断层摩擦阻力的大或小都不是决定因素,而具有较长的匀阻段才是发生大震的首要条件。

关键词: 地震模拟, 断层段, 断层失稳, 摩擦规律, 匀阻段