抄録
A flexible string is used at various places. Typical examples are a cable for power transmission and communication and a wire for cranes and elevators. In addition, there are the uses such as a fly-fishing line, a rope for mountain climbing and a mowing machine to cut turf by turning a nylon string. In the past study, a string pendulum was paid attention as the basic motion of the string. An analysis model of the string pendulum was made by multi-body dynamics and the behavior of the string pendulum was clarified. However, axial elongation was not considered. In fact, the string extends in the axial direction by the mass of itself and the external force and it is expected that the behavior of the string is affected by the axial elongation. Therefore, it is thought that it is necessary to carry out numerical simulation in consideration of the axial elongation in order to grasp the behavior of the string more exactly. In this study, an analysis model considering axial elongation is made and appropriateness of the modeling is verified by comparing an experiment result and an analysis result. And characteristics of the behavior of the string when the string extends in the axial direction are clarified.
