| 摘要 |
<p>PURPOSE:To prevent resonance of a jumper unit against span galloping, by computing the line-directional oscillation period of the jumper unit precisely, and by correcting the lengths of suspension members and inclinations from perpendicular lines based on said period. CONSTITUTION:As the line-directional oscillation period estimation equation of a jumper unit, a corrected equation due to the rigidity of a jumper wire set by an actual scale test is used. When an oscillation period found by the equation coincides with each period of the fundamental loop of span galloping, two loops, and three loops, then one value at least among the lengths l1, l2 of suspension members 5, 5' and inclinations alpha1, alpha2 against perpendicular lines is changed so that the periods of each loop cannot coincide with each other, and the shape of the unit is changed, and the unit in the changed shape is set in a spcified field as a finished product.</p> |
