長さ変化を伴う柔軟体の非線形動力学解析における計算点の配置法

抄録

In recent years, flexible bodies such as cable have been used as part of multiboby system, for example cranes and elevators. When analyzing the behavior of these flexible bodies by the finite element methods, some elements move across the boundaries between the region which have different condition. So it is necessary to distinguish in which region each nodes exists, it makes the analysis more complicated. ALE-ANCF (Arbitrary Lagrangian Eulerian Absolute Nodal Coordinate Formulation) that previous study developed is an efficient solution for this problem because some nodes can be fixed at boundaries and other nodes can be arranged arbitrarily in each region. On the other Hand, there is a problem that the analysis accuracy is reduced when the element length changes significantly from the initial state. This study proposed a method to add or remove nodes according to the element length in order to eliminate the significant change in the element length.By analyzing the flexible body with time-varying length, this study tried to verify the validity of proposed methods.