海洋结构物跨尺度水弹塑性相互作用及其分析方法  

Cross-scale Hydro-Elastoplastic Interaction and Analysis Method of Marine Structures

作　　者：方辉[1] 李爱军 金子健 刘勇[1] Fang Hui;Li Aijun;Jin Zijian;Liu Yong(College of Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2023年第10期1-10,共10页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(52088102)资助。

摘　　要：复杂恶劣的海洋环境下结构物承载性能的提升与安全保障,需要考虑海洋环境载荷与宏观结构(特征尺度可达102 m)、局部构件(特征尺度约10-1 m)和微细观材料结构(特征尺度可至10-6 m)之间的跨尺度相互作用。工程结构的失效起源于材料微结构内的损伤与缺陷,演化包含所有尺度的相互作用。海洋环境载荷下宏观结构-细观构件-微观材料的跨尺度耦合作用及演化,决定了结构物承载、退化及破坏的综合性能。因此,宏观结构的工程设计,需要全面分析构件和材料的基本特性。新设施、新装备和新能源等海上工程的快速发展,对海洋结构物跨尺度分析的需求更加强烈,而传统分析方法在单一尺度分别建立力学模型再实施计算,难以有效实施结构物的综合设计优化,严重滞后工程需求。如何从理论上构建结构物分析中多个尺度的耦合关系,并在多个尺度中同步开展高效计算,已成为海上工程建设面临的前沿科学问题与关键技术难题。本文围绕大型海洋结构物的安全设计,综述了海洋结构物跨尺度相互作用关键理论的总体思路和核心路径、结构水弹性和水弹塑性跨尺度分析研究进展、材料多尺度方法在海洋结构物跨尺度分析中的应用,讨论了跨尺度分析方法在海洋结构物承载性能提升方面的应用,展望了跨尺度分析方法的未来发展趋势及应用前景。To improve the load-carrying capacity and safety assurance of the structures in the complicated and harsh marine environment,it is necessary to consider the cross-scale interactions between marine environment loadings and macroscopic structures(feature scales up to 102 meters),local members(feature scales around 10-1 meters),and meso-and micro-structures of the materials(feature scales up to 10-6 meters).The failure of engineering structures results from the damage and defects in the material micro-structure,which evolves to all scales and undergoes coupling effects.The cross-scale coupling effect and evolution of macroscale structure,mesoscale member,and microscale material under marine environment loadings determine the comprehensive performance(e.g.,load-carrying,and damage resistance)of the structure.Thus,the engineering design of macroscopic structures requires a comprehensive analysis of the basic characteristics of members and materials.The rapid development of offshore engineering such as new facilities,equipment,and energy sources has increased the demand for cross-scale analysis of marine structures.Traditional analysis methods are establishing the mechanical models separately at a single scale and then the corresponding calculations are performed,which is difficult to effectively implement the comprehensive design and optimization of structures and seriously lags behind engineering requirements.For offshore engineering construction,theoretically establishing the coupling relations between multiple scales in structural analysis and conducting efficient calculations simultaneously in multiple scales have become cutting-edge scientific problems and key technical challenges.This study focuses on the safety design of large-scale marine structures,summarizing the overall idea of cross-scale interactions and key technologies for marine structures.For instance,the research progress of cross-scale analysis for structural hydro-elastoplasticity,and the application of the material multiscale method in cross-scale

关 键 词：海上工程 跨尺度耦合 水弹塑性 代表体元 高效计算 性能提升 

分 类 号：P752[天文地球—海洋科学]