南方能源建设2024，Vol.11Issue(2)：68-81,14.DOI:10.16516/j.ceec.2024.2.07
统一硬化本构在海上风电大直径单桩桩-土分析中的应用
Application of Unified Hardening Model in Soil-Pile Analysis of Offshore Wind Power Large-Diameter Monopiles
摘要
Abstract
[Introduction]In order to facilitate the design optimisation of foundation for offshore wind turbines,it is necessary to promote application of advanced geotechnical constitutive models that are theoretically sound and capable of modelling realistic soil behaviours in real engineering scenarios.[Method]Firstly,the theoretical framework of the Unified Hardening model(UH model),an advanced constitutive model,was introduced.Then,further modifications oriented to requirements in real engineering applications were presented.Finally,the modified model was applied to the pile-soil analysis of large-diameter monopoles,and the results were analyzed at the macroscopic and element level to verify its effectiveness and practicability.[Result]The UH_G0 model obtained through modification and verification is applicable to addressing issues in real engineering practices.The parameter"initial void ratio"in the original UH model is replaced by"overconsolidation ratio".By incorporating the Andersen empirical formula,the shear modulus is decoupled from the constitutive parameter κ,significantly improving the initial shear stiffness of the original UH model,and thus allowing the UH model to be applicable to the deformation(stiffness)sensitive boundary value problems.[Conclusion]As an advanced constitutive model with a well-defined theoretical framework and physically meaningful parameters,the UH model demonstrates high potential for practical engineering applications.The two modifications tailored to engineering design requirements are necessary,which improve the convenience in application of the UH model to address boundary value problems and the accuracy in calculating initial stiffness,respectively.The modified UH_G0 model is proven to be effective and practical for solving practical engineering problems in the process of finite element simulation.关键词
海上风电/统一硬化本构模型/大直径单桩基础/桩-土分析Key words
offshore wind power/unified hardening model/large-diameter monopile foundation/soil-pile analysis分类
动力与电气工程引用本文复制引用
马兆荣,刘振韬,王金玺,张友虎..统一硬化本构在海上风电大直径单桩桩-土分析中的应用[J].南方能源建设,2024,11(2):68-81,14.基金项目
国家自然科学基金资助项目"海上风机吸力桶导管架基础长期沉降机理与计算方法"(52109117) （52109117）
中央高校基本科研业务费专项资金资助 （）
中国能建广东院科技项目"海洋工程地质勘察、解析及应用关键技术研究"(EV05881W) （EV05881W）
