计算力学学报2023，Vol.40Issue(6)：879-884,6.DOI:10.7511/jslx20220514001
随机风-浪一体化降维建模及风机结构可靠度研究
Research on integrated dimension-reduction modeling of stochastic wind-wave and reliability of offshore wind turbines
摘要
Abstract
Based on the spectral representation dimension-reduction method of stochastic fluctuating wind field and wave force field,the fluctuating wind speed Davenport spectrum and wave P-M spectrum are used to construct the wind and wave spectral parameters,and the same elementary random variables are applied to ensure the consistency of probability information of wind and wave,so as to realize the integrated dimension-reduction modeling of stochastic wind-wave field.Furthermore,based on finite element software ANSYS,the numerical model of an offshore wind turbine tower is established,and the dynamic reliability of the structure under three working conditions is analyzed with the top displacement as the index.Numerical examples verify the effectiveness of the proposed integrated dimension-reduction modeling method for stochastic wind-wave field.The structural dynamic analysis shows that the influence of wind load on the top displacement response of the wind turbine tower is dominant,and the effect of wave load cannot be ignored.In addition,the probability information of representative samples generated by the integrated dimension-reduction method is complete,which can be combined with the probability density evolution theory to realize the refined dynamic response and reliability analysis of offshore structures subjected to the combined action of wind and wave.关键词
脉动风场/波浪力场/一体化建模/降维方法/近海风机/可靠度分析Key words
fluctuating wind field/wave field/integrated modeling/dimension-reduction method/offshore turbine/reliability analysis分类
海洋科学引用本文复制引用
吕康玄,张文远,贺炳楠,刘子心..随机风-浪一体化降维建模及风机结构可靠度研究[J].计算力学学报,2023,40(6):879-884,6.基金项目
国家自然科学基金(52108444) （52108444）
河北省自然科学基金(E2021512001) （E2021512001）
地震科技星火计划(XH23065YA)资助项目. （XH23065YA）
