Abstract
In this paper, the parameters (e.g. coefficients of restitution, friction coefficient, translational and rotational energies, and their energy ratio) for spherical boulder impacting on rock plate will be presented based on our experimental and numerical analysis data by free-fall-rebounding laboratory experiment using high-speed video camera system. This paper explains influence of combination of normal and tangential components of coefficients of restitution for numerical analysis on rockfall motion. In this study, friction coefficients of slider for numerical analysis are decided based on tilt test, and coefficients of restitution by experimental data. The result of numerical analysis showed that the increasing trend of the tangential component of coefficients of restitution can be modeled with spring-dashpot-slider system. Furthermore, this study investigates the rotational motion by numerical analysis of rigid model. In this numerical analysis results, the input of friction coefficient is one of the factors that greatly affect the value of tangential component of coefficients of restitution and rotational energy.
