Sliding contact on the interface of elastic body and rigid surface using a single block Burridge-Knopoff model

9th International Conference on Tribology

Amireghbali, A.^1 ; Coker, D.^1,2

Department of Aerospace Eng., METU, Ankara, Turkey^1

METU Center for Wind Energy (METUWIND), Ankara, Turkey^2

关键词: Burridge-Knopoff model;    Constant velocities;    Dynamics of interfaces;    Mass-spring models;    Nonlinear ordinary differential equation;    Numerical integration methods;    Sliding contacts;    State-dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/295/1/012031/pdf
DOI  :  10.1088/1757-899X/295/1/012031

来源: IOP

【 摘 要 】

Burridge and Knopoff proposed a mass-spring model to explore interface dynamics along a fault during an earthquake. The Burridge and Knopoff (BK) model is composed of a series of blocks of equal mass connected to each other by springs of same stiffness. The blocks also are attached to a rigid driver via another set of springs that pulls them at a constant velocity against a rigid substrate. They studied dynamics of interface for an especial case with ten blocks and a specific set of fault properties. In our study effects of Coulomb and rate-state dependent friction laws on the dynamics of a single block BK model is investigated. The model dynamics is formulated as a system of coupled nonlinear ordinary differential equations in state-space form which lends itself to numerical integration methods, e.g. Runge-Kutta procedure for solution. The results show that the rate and state dependent friction law has the potential of triggering dynamic patterns that are different from those under Coulomb law.