Host: Japan Association for Wind Engineering
Pages 173-174
In this study, to compare the galloping suppression effect depending on rotational clamps arrangement of loose spacers, we performed wind tunnel tests using sector models of four-bundled conductors. When the ice accretes in the conductor in the assumed wind direction, the four-bundled conductors with one-sided loose spacers are more effective than those with diagonal loose spacers. However, when ice accretes in the opposite wind direction in which two rotatable sub-conductors are placed at the downwind side, have a tendency to encourage galloping more than those without an anti-galloping device. In contrast, the diagonal loose spacers provide a suppression effect regardless of the wind direction. These differences are caused by the aerodynamic moment acting on the entire four-bundled conductor and depends on the arrangement of the rotatable sub-conductors.
