Winkler 지반과 비틀림 각이 고려된 축력을 받는 회전하는 보의 동적 해석

Abstract

In this paper, a dynamic analysis of spinning beam subjected to axial forces considering Winkler foundation and Pretwisted angle was performed. A typical example of a structure that spinning under the axial force is drilling system, since the bending stiffness is decreased by axial force, it is necessary to develop and study a structural dynamics model that can understand the dynamic characteristics. In this study, a beam model to express the effect of reducing the bending stiffness by axial force is modeled by the Hybrid Deformation Variable Modeling Method and a Moving Winkler Foundation model is used to express the stiffness distribution of workpiece that varies with time. Numerical results show that the natural frequency abruptly drops at the point of contact between the beam structure and the workpiece