Bending test of stiffened aluminum-alloy plates by impulsive water pressure.

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  • Ａｌ合金補強平板の水面衝撃曲げ試験
  • Al ゴウキン ホキョウ ヘイバン ノ スイメン ショウゲキ マゲ シケン

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Stiffened aluminum-alloy plates under impulsive water pressure were tested, in order to obtain useful design data about elastic response, compared with the case of equal peak static pressure. Using test data, experimental equations about impulsive pressure and deflection were determined by substituting measured water contact conditions and viscous damping coefficients into them, respectively. In case of irregular impulsive pressure, statistical frequency analyses were pursued between pressure and deflection to certify their linear relation. Total responses, therefore, are given by summing up the response due to each pressure having a natural frequency obtained from the irregular pressure. Deflections and stresses are confirmed as showing about a 30 percent increase compared with the static case if the acting period impulsive pressure nears the natural frequency period of the stiffened plate.

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