کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11031416 1645998 2019 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel spectral moments equivalence based lumping block method for efficient estimation of offshore structural fatigue damage
ترجمه فارسی عنوان
یک روش بلوک تخلیه مبتنی بر همبستگی لحظه ای جدید برای تخمین کارآیی خسارت خستگی ساختاری در دریای خزر
کلمات کلیدی
پلت فرم دریایی، ارزیابی خستگی، روش بلوک شکن، لحظات طیفی موج، اصل هماهنگی خستگی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
This paper provides a novel lumping block equivalence method, termed as spectral moments equivalence (SME) based method, to improve the efficiency of fatigue assessment in preliminary design stage. In the newly SME method, an equivalent equation of representative sea state's spectral wave energy and original sea state's spectral wave energy is set up in the fatigue equivalence viewpoint. The relations of wave parameters and wave spectral moments are introduced into the SME method to determine the equivalent significant wave height and up-crossing wave period of the representative sea state. A key feature of the SME method is that the effect of S-N curve's slope and quantity of sea state in lumping block is incorporated into the equivalent formulae to make the method applicable to different lumping block partitions and fatigue curves. In addition, the SME method also has advantage of preserving the stochastic characteristics of sea states. Cumulative fatigue damage of fixed and floating offshore platforms are generated to verify the validity and applicability of the SME method. Numerical results indicate that the SME method not only yields the most accurate fatigue assessment but also has robustness to block partitions and offshore structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 118, January 2019, Pages 162-175
نویسندگان
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