Galloping Characteristics of Conductor Accreted with Crescent-Shaped Ice
Accounting for the disastrous phenomena of ice-accreted conductor galloping, wind tunnel tests of LGJ630/45 conductor accreted with crescent-shaped ice are conducted. Based on the test results, conductor galloping is simulated by employing the PCL language of ANSYS commercial software package and then the influences of span lengths as well as free-stream speeds on galloping characteristics are studied. The results indicate that, conductor galloping consists several different frequency components. With the increase of span length, galloping energy moves from low-frequency component to its high-frequency counterpart, and finally high-frequency component dominates the galloping phenomenon. And with the movement of energy, galloping traces transforms from ellipse to that similar to a butterfly. With the increase of span length, the maximum cable tension first increases, next decreases sharply, and then increases again.
Chunliang Zhang and Paul P. Lin
H. X. Dang et al., "Galloping Characteristics of Conductor Accreted with Crescent-Shaped Ice", Applied Mechanics and Materials, Vols. 226-228, pp. 158-161, 2012