シングルデッキ型円筒貯槽浮屋根の非線形スロッシング挙動<br>模型実験と理論解析の比較

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  • 松井 徹哉
    名古屋産業科学研究所 上席研究員・工博，名古屋大学 名誉教授
  • 永谷 隆志
    中央図研技術部技術二課 博士（工学）

書誌事項

タイトル別名
  • NONLINEAR OSCILLATION OF A FLOATING ROOF IN A CYLINDRICAL TANK UNDER LIQUID SLOSHING<br>Model tests versus theoretical prediction
  • NONLINEAR OSCILLATION OF A FLOATING ROOF IN A CYLINDRICAL TANK UNDER LIQUID SLOSHING : Model tests versus theoretical prediction

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 Shaking table tests are carried out to investigate the nonlinear oscillation of a floating roof in a cylindrical tank under liquid sloshing. The experimental tank is a stainless steel cylinder of 800 mm in radius with a single-deck type floating roof composed of an inner deck made of polyvinyl chloride sheet and an outer pontoon made of acrylic plate. The razor sensor system is employed to measure the roof displacements. The tests are performed using the 2003 Tokachi-oki earthquake record at Tomakomai K-NET station. The time scale of the earthquake record is so reduced according to the similarity law that the test model corresponds in real scale to a typical oil-storage tank of 30,000m3 capacity. It is observed that the nonlinear oscillation modes with the numbers of circumferential waves 0 and 2 may occur, which can never be predicted by the linear theory. The test results are compared with nonlinear analysis based on the hybrid analytical and FE method proposed by the authors. Overall agreement is confirmed between the analysis and the experiment.

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