TY - CONF A1 - Stengel, Dominik A1 - Mehdianpour, Milad A1 - Clobes, M. A1 - Thiele, K. A2 - Cunha, A. A2 - Caetano, E. A2 - Ribeiro, P. A2 - Müller, G. T1 - Numerical simulation of an overhead power line section under wind excitation using wind tunnel test results and in-situ measured data T2 - EURODYN 2014 - 9th International conference on structural dynamics (Proceedings) N2 - Overhead transmission lines are very sensitive structures in regards to wind action. The cables, spanning over a few hundred meters contribute in particular to the overall action on the suspension towers. These slender structures incorporate both structural nonlinearities from the large deformation of the cables and aerodynamic nonlinearities which need to be accounted for when it is to estimate the system response to strong wind events. In this work, a finite element procedure is presented to model an existing power line section using nonlinear cable elements. The wind force is assumed quasi-steady with force coefficients determined in wind tunnel test on a conductor section. Further, aerodynamic damping is incorporated by considering the relative velocity between cable nodes and oncoming wind flow. The results are compared with on-site measurements of the cable’s support reaction. The results show a significant effect of damping since almost no resonant amplification is visible both in observation and simulation. In addition, wind tunnel tests approved aerodynamic damping to be large for the system of sagging cables, but nonlinear in its nature. It is concluded, that the dynamic response of overhead transmission line cables has to be modeled with care, considering all sources of nonlinearities. That is of particular interest in case of random excitation such as wind because the peak response depends on the probability distribution of the system's response. T2 - EURODYN 2014 - 9th International conference on structural dynamics CY - Porto, Portugal DA - 2014-06-30 KW - Overhead transmission lines KW - Cable dynamics KW - Aerodynamic damping KW - Wind tunnel KW - In-situ measurements PY - 2014 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/30993 AN - OPUS4-30993 SN - 978-972-752-165-4 SN - 2311-9020 SP - Paper MS07, 1 EP - 6 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany