パワースペクトルに二つのピークを有する定常不規則波のレインフローレンジ分布

概要

論文の詳細を見る
The distribution of rainflow range is investigated for the Gaussian random process under bimodal PSD. The new method evaluates the distribution of range by taking the sum of two Rayleigh distributions which correspond to two dominant frequencies in bimodal PSD. Representative distribution data have been obtained from rainflow analysis for simulated time histories. The applicability of the proposed method is examined for the range distribution generated by the simulation. It is shown that the method evaluates the distribution of range with high accuracy even for the random wave giving a large irregularity factor in some cases. Since range data for unimodal PSD can be evaluated by Rayleigh approximation, the new method for bimodal PSD greatly extends the region of analytical treatment.
1994-06-25