A new effective approach to calculate wind-induced response of latticed transmission tower considering aerodymamic damping

• 1、School of Civil & Hydraulic Engineering, Dalian University of Technology

Abstract：It is very necessary, in order to evaluate the wind-induced responses of latticed transmission towers more accurately, to conduct wind tunnel test of aeroelastic models because they are lightweight, very tall, flexible structures characterized by low damping. Interaction between aeroelastic model and wind field yields aerodymamic damping force. So, from the conventional perspective, evaluation of aerodymamic damping becomes the necessary step for the calculation of structural response. In this paper, a new approach called here DTF (Directly Transfer Function) method is presented and proposed to calculate the RMS structural displacement response. The new approach is reasonable and feasible and has explicit physical meaning. Comparing with conventional method, the advantage of the new approach is that it can avoid the process of evaluating aerodymamic damping ratio and so the possible calculation error production that is due to the inaccuracy of evaluating aerodymamic damping can also avoided.

Keywords： transmission tower aeroelastic model wind tunnel test aerodymamic damping direct transfer function method