緊張係留構造物(TLP)のリンギング応答 : 3次波力の解析

概要

論文の詳細を見る
Recent tension leg platform (TLP) model tests have revealed strong transient resonant responses during extreme wave frequency responses. It is said that these responses, called ringing, are associated with higher order forces induced by large-crested, near breaking waves. In this paper, as a second step of giving light on the occurrence mechanism of such nonlinear phenomenon, third order wave force measurement test are carried out in regular and irregular waves. A third order spectral analysis method (the so-called Cross tri-spectral analysis) is newly developed to estimate the second and third order transfer functions of wave loads on TLP. And the numerical calculation method based on the third order diffraction theory (Malenica and Molin theory) has been developed for a vertical uniform cylinder. Both the calculation result and the approximate solution for a vertical uniform cylinder, which is derived by Faltinsen-Newman and Vinje (low ka-low kA theory : k ; wave number, a ; cylinder radius, A ; wave height), are used to evaluate approximately the third order force on TLP under the assumption taking only the phase difference based on the column distance of TLP into account. As a result, the present higher order spectral analysis method is much effective for identifying the higher order transfer functions from wave force data in irregular waves. However, the approximate methods used for estimating the third order force on TLP underpredict against the experimental results. It is necessary to take account of some interaction effect between columns.
社団法人日本船舶海洋工学会の論文

緊張係留構造物(TLP)のリンギング応答 : 3次波力の解析

スポンサーリンク

概要

著者

関連論文

スポンサーリンク