http://www.sciencedirect.com/science/journal/01410296 | http://www.sciencedirect.com/science/journal/01410296This study presents a method to identify the periodic galloping response and random gust response of transmission line based on field observed data and to separate major galloping component from mix mode of gust and galloping vibration. Time-averaged characteristics of wind-induced vibration are discussed based on spectral analysis and non-stationary characteristics are considered to identify the wind-induced vibration quantitatively by applying Prony’s method in piecewise fashion. By applying highpass filter major galloping response component is separated from mixed response and characteristics of thus separated major galloping response component are compared with those of total response. Results of these analyses show possibilities of large amplitude galloping as well as gust response in in-plane vertical motion in ice-accreted transmission line. Applicability of random decrement method to estimate the existence of periodic correlated galloping component is also discussed.textapplication/pdfjournal articl
