首页|砂土刚度衰减模型在海上风电工程中的应用

砂土刚度衰减模型在海上风电工程中的应用

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海上风电基础的受荷环境复杂,风、浪、流等循环荷载作用下砂土地基会发生软化现象,易造成结构的失稳倾覆,现有通用有限元软件较难直接得到合理的计算结果.砂土刚度衰减模型是分析循环横向承载工况下砂土地基受力变形规律的有效方法,基于ABAQUS计算内核,采用FORTRAN77 语言编写了相应程序,建立了大直径单桩基础、负压筒基础以及导管架基础的有限元模型,分析循环承载工况下结构的受力变形规律和材料的刚度发展趋势.结果表明,程序的精确性与通用性均有很好的实用价值,求解的每个增量步能依据积分点的应力状态与循环次数对砂土的刚度进行折减修正,实现了砂土刚度衰减模型在通用有限元软件的内嵌,可为工程设计参考.
Application of stiffness attenuation model of sandy soil in offshore wind power engineering foundation
The loading environment of offshore wind turbine foundations is complex,characterized by cyclic loads such as wind,waves,and currents.Under the influence of these cyclic loads,the sandy soil foundation may undergo liquefaction,which can readily result in structural instability and overturning.Existing general finite element software encounters challenges in directly obtaining accurate calculation results.The degradation stiffness model of sandy soil is a effective method for analyzing sand foundation under cyclic lateral loading.This paper used FORTRAN77 language to compile a subprogram,which was embedded into the ABAQUS calculation core.The finite element models of large-diameter single pile foundation,barrel foundation and jacket foundation were established,and the deformation rule of the structure under cyclic loading and the development trend of material stiffness were analyzed.The results showed that the accuracy and generality of the subprogram satisfy the analysis re-quirements and can be used as a reference for engineering design.

offshore wind power foundationstiffness attenuation model of sandy soilcyclic lateral loadingsubprogram

胡烨之、张雅琪、卢昌红

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上海慧广科技发展有限公司,上海 200030

上海市政工程设计研究总院集团第六设计院有限公司,安徽 合肥 230001

合肥瀚网软件科技有限公司,安徽 合肥 230088

海上风电基础 砂土刚度衰减模型 循环承载工况 子程序

国家自然科学基金项目

52079035

2024

江淮水利科技
安徽省水利志编辑室 安徽省水利学会

江淮水利科技

影响因子:0.087
ISSN:1673-4688
年,卷(期):2024.(3)
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