Dynamic interaction between the transmission wire and cross-frame

Abstract

In the construction process of electricity facilities, after wire broken or tension failure, the wire will drastically rush through the iron towers and drop onto the shelter structure named cross-frame. In this investigation, A systematical dynamic analysis method is developed to investigate the dynamic interaction between the electricity transmission wire and cross-frame, which is crucial for ensuring the safety of the construction engineering. The Absolute Nodal Coordinate Formulation cable element is used to model the transmission wire. The methodology of describing and solving the sliding joints between the wire and the iron towers is developed. An efficient contact searching procedure is proposed based on the spatial beam-to-beam contact manner. Since the dynamic properties of the wire and cross-frame are quite different, the co-simulation technology is created. An impact example between a free falling wire and the steel rods is performed both numerically and experimentally. Finally, a full-size cross-frame-wire model is tested. The feasibility, accuracy and efficiency of the proposed procedure are demonstrated, which can significantly improve the efficiency of the cross-frame design and ensure the safety of the electricity facility construction.