Predicting Galloping Amplitudes

Abstract

The use of wind tunnel data, lift and drag, together with a method of analysis, leads to estimates of gallop amplitudes. No damping is considered. The nonlinear analysis is similar to the describing‐function method used in control system design. The method is convenient to use because it can account for effects of Reynold's number directly. Two bluff body shapes are chosen to illustrate the prediction method. The first shape is the square section. This is also compared with earlier results. The second shape is the simulated ice shape on a round conductor. The results compare favorably with previous work.