没水球体に作用する回折波力の数値解析

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  • 岩田 好一朗
    社団法人 土木学会 名古屋大学 工学部土木工学科
  • 水谷 法美
    社団法人 土木学会 名古屋大学 工学部土木工学科
  • 都築 克嘉
    社団法人 土木学会 エコー (株) 第1技術部数理解析課

書誌事項

タイトル別名
  • NUMERICAL ANALYSIS OF DIFFRACTED WAVE FORCE ACTING ON A SUBMERGED SPHERE
  • ボッスイ キュウタイ ニ サヨウスル カイセツ ハリョク ノ スウチ カイセキ

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抄録

This study is to discuss the wave force acting on a submerged sphere due to the diffracted wave based on a numerical analysis. The hybrid method is employed to calculate the velocity potential of the diffracted wave.<br>The added mass coefficient, the force coefficients, the dominant range of the diffraction force are investigated in relation to the wave height distribution and non-dimensional parameters such as the relative sphere radius to the wave length, ka, the relative sphere diameter to water depth, D/h, and the relative submergence, d/h. The wave diffraction is governed by ka, D/h and d/h. The effect of wave diffraction to the vertical wave force is generally larger than that to the horizontal one. The added mass coefficient becomes larger with an increment of D/h and with decreasing of d/h for the same ka. When the change of wave heights is less than 5%, the diffracted wave has little effect to the wave force. The range in which the diffraction theory is applied in calculating the wave force is given graphically as a function of ka, d/h and D/h.

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  • 土木学会論文集

    土木学会論文集 1989 (411), 187-196, 1989-11-20

    公益社団法人 土木学会

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