102 正方形断面柱に発現するギャロッピング現象の解明

概要

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The generation mechanism and suppression of flow-induced vibration of rectangular prisms were experimentally investigated. The present study focused galloping of a square prism, which is one of flow-induced vibrations generated in a rectangular prism. The square prism having width to height ratio B/H=1.0 in which galloping starting spontaneously from rest can occur for 0.75<B/H<3.0,approximately, is adopted. At first, the response characteristics of a square prism are investigated on the free-vibration test. Next, the generation mechanism of galloping is discussed with the results of the forced-vibration test. The experimental results obtained in a wind tunnel showed that the galloping becomes divergent when work done by fluctuating lift is positive work.
一般社団法人日本機械学会の論文
2002-10-05