超大型浮体の弾性応答基本特性に関する一考察

概要

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The characteristic features of hydro-elastic responses of a very large floating structure(VLFS)in waves are discussed. Simplified formulas are given for the wave number of structural deflection, char-acteristic wave number, and natural frequency for elastic-mode motion, which are basic parameters having significant influence on hydro-elastic responses of a VLFS. Dynamic behaviors of a VLFS in irregular waves are also investigated based on simplified formulas for structural deflection. It is shown that the response of structural deflection at midship in irregular waves, which is represented by the ratio of the significant value of the structural deflection to significant wave height, tends to be less dependent on the length of a VLFS as the length increases. This result is confirmed by illustrative computations using two-dimensional eigen-function method, and suitable diagrams for predicting the response of structural deflection of a VLFS in irregular waves are produced considering the result.
社団法人日本船舶海洋工学会の論文
2000-09-25