关键词: 位错模式, 有限无分析, 断裂位错, 断层位移速率

Abstract: Available are a lot of data about the slip rate for the Huoshan fault and the dislocations associated with Hong tong 1303 M8 earthquake and the Cenozoic activities are investigated for the Linfin basin. In this paper,Huoshan fau It plane is taken as dislocation plane。The stress rates and strain energy rates corresponding to the fauIt creep in pre-seismic period and the fault dislocation in co-seismic period have been calculated by means of the finite element formula of dislocation model in viscoelastic medium. Three results have been obtained:(1)Prior to Hongtong 1303 earthquake,he stress and strain energy rates are the highest for the southern section of the Huoshan fault in the Linfin basin,suggesting aaccumulating process.However,the minus rates are the highest in co-seismic period,suggesting a relieving process。(2)Hongtong 1303 earthquake speeded up the accumulation of strain energy for Linf in 1695 earthquake.(3)Application of split node technique in fimite element analysis to discreteness of the dislocation planes is in agreement with the dislocation concept.

Key words: Dislocation model, Finite element analysis, Fracture dislocation, Fault displacement rate