TY - CONF A1 - Stengel, Dominik A1 - Peil, U. ED - Ruscheweyh, H. ED - Krafczyk, M. T1 - Zur Bemessung von Freileitungsgittermasten auf Wind auf Leiterseile nach der Freileitungsnorm DIN EN 50341-3-4: 2011 T2 - 14. Dreiländertagung D-A-CH 2015 - Windingenieurtechnik - Vom Bauteilnachweis bis zum Stadtklima N2 - Der folgende Beitrag befasst sich mit der analytischen Herleitung eines sog. Spannweitenfaktors zur Berücksichtigung der Korrelation der Windeinwirkung auf weitgespannte Freileitungsseile. Insbesondere zur Abschätzung der Windlast auf Maste trägt dieser Lastfall maßgebend zur Bemessung bei. Mithilfe von Naturmessungen und Simulationen werden zugrunde gelegte Annahmen überprüft und validiert. Die Ergebnisse werden schließlich anhand der einschlägigen Regelwerke verglichen und bewertet. N2 - The following paper addresses an analytical derivation of a so-called span reduction factor considering the correlation of wind acting on wide spanning overhead transmission line conductors. This load case contributes significantly to the estimation of the total wind load on the towers in particular. With the aid of full scale measurements as well as simulations, the underlying assumptions are reviewed and validated. Finally the results are compared and evaluated with applicable standards. T2 - 14. Dreiländertagung D-A-CH 2015 - Windingenieurtechnik - Vom Bauteilnachweis bis zum Stadtklima CY - Braunschweig, Germany DA - 05.10.2015 PY - 2015 SN - 3-928909-13-4 N1 - Serientitel: WtG-Berichte – Series title: WtG-Berichte IS - 14 SP - 109 EP - 119 AN - OPUS4-34543 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Stengel, Dominik A1 - Thiele, K. A1 - Clobes, M. A1 - Mehdianpour, Milad T1 - Aerodynamic damping of nonlinear movement of conductor cables in laminar and turbulent wind flow T2 - ICWE14 - 14th International conference on wind engineering N2 - It is widely accepted that aerodynamic damping is a decisive parameter influencing the dynamic response of overhead transmission line conductors in turbulent wind flow. But anyway, methods of how to account for the effects of aerodynamic damping differ significantly and so might do the results. In this work, the source of aerodynamic damping shall be revised leading to the well-known formulation for a linear pendulum being the result of the relative velocity between the structure and wind flow. Based on wind tunnel tests and validated by simulations, the differences to a pendulum movement of a sagging cable are shown. The reasons for that deviation are the large deflections, resulting in a movement non parallel to the acting wind flow. For some analysis, in particular those in frequency domain, it is practically not possible to incorporate aerodynamic damping implicitly by fluid structure interaction. If the dynamic movement can be linearized at a working point of the mean deflection, a modification to the linear approach is suggested. This approach is validated by simulation with a finite element model of an existing overhead transmission line, calibrated with onsite measurements for wind velocities at lower levels. Further accent is put on the different possibilities to incorporate aerodynamic damping in time step analysis, such as Rayleigh damping or modal damping. The differences between both approaches are emphasized and modal damping is shown to be the most adequate representation of aerodynamic damping. T2 - ICWE14 - 14th International conference on wind engineering CY - Porto Alegre, Brazil DA - 21.06.2015 KW - Aerodynamic damping KW - Conductor cables KW - Overhead transmission lines KW - Wind tunnel experiments KW - Nonlinear finite element simulation PY - 2015 SN - 978-85-66094-07-7 SP - 1 EP - 9 AN - OPUS4-33612 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Stengel, Dominik A1 - Thiele, K. A1 - Clobes, M. A1 - Mehdianpour, Milad T1 - Aerodynamic damping of nonlinear movement of conductor cables in laminar and turbulent wind flow T2 - 14th International Conference on Wind Engineering T2 - 14th International Conference on Wind Engineering CY - Porto Alegre, Brasil DA - 2015-06-21 PY - 2015 AN - OPUS4-33549 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Stengel, Dominik A1 - Peil, Udo T1 - Zur Bemessung von Freileitungsgittermasten auf Wind auf Leiterseile nach der Freileitungsnorm DIN EN 50341-3-4: 2011 T2 - 14. Dreiländertagung der WtG T2 - 14. Dreiländertagung der WtG CY - Braunschweig, Deutschland DA - 2015-10-05 PY - 2015 AN - OPUS4-34393 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -