鋼鈑桁橋の鉛直 2 次モードの振動に着目した低周波振動対策に関する研究

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  • Study on countermeasure of low-frequency vibration focused on the second vertical vibration mode induced by highway bridge vibration
  • コウ ハンゲタバシ ノ エンチョク 2ジ モード ノ シンドウ ニ チャクモク シタ テイシュウハ シンドウ タイサク ニ カンスル ケンキュウ

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<p>Low frequency sound is supposed to be induced by the bridge vertical secondary mode vibration and has the maximum value - in the 10-20 Hz band - registered immediately after a large vehicle pass over the expansion joint. Considering the external force characteristics and in the bridge vibration properties, measures against the noise in the 10-20 Hz band were studied. The bridge and the countermeasures elements were modeled in 3D FEM and the vehicle dynamics effects were considered in the analysis. Based on those results, the main factors and the countermeasures effectiveness are discussed.</p>

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