有限な薄氷盤に囲まれた固定式中空円筒構造物の地震流力弾性解析

概要

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The hydroelastic response of fixed hollow cylindrical structures surrounded by thin floating ice sheet of finite width during earthquakes is formulated. The 'elastic shell theory is used for structures, whereas the potential flow theory is applied to fluid domain. The sea ice is idealized as the annular rigid boundary that is connected with semi-infinite free surface. The hydrodynamic pressure is obtained in closed form by domain division method. Wet mode properties in beam mode of hollow cylindrical structure are evaluated by Rayleigh-Ritz method. Modal superposition approach is used to calculate the earthquake response against horizontal ground motion. Numerical examples are presented to illustrate the changes in hydrodynamic pressures and earthquake responses due to the width of ice sheet.
2001-04-30