Offline iteration-based real-time hybrid simulation for high-fidelity fluid-structure dynamic interaction in structures subjected to seismic excitation

IF 4.4 2区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computers & Structures Pub Date : 2024-11-04 DOI:10.1016/j.compstruc.2024.107579
Yuchen Hu , Yafei Zhang , Zihao Zhou , Ning Li , Dan Zhang
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Abstract

This study introduces an offline iteration-based real-time hybrid simulation (OI-RTHS) method, a novel approach for simulating fluid–structure dynamic interaction (FSDI) under seismic excitation. With this method, hydrodynamic forces are treated as a physical substructure, while numerical computation and servo loading are performed independently throughout the entire duration of the seismic event. By iteratively correcting the input command signals and obtaining the output response signals during each iteration process, they can eventually achieve balanced coordination at the boundaries. This characteristic introduces real hydrodynamic data to address the limitations of purely numerical theoretical analysis, ensuring high fidelity. Additionally, it reduces the need for real-time communication between numerical computation and servo loading, thereby reducing hardware and software requirements. In this study, experimental verification of the proposed method is conducted, and the results illustrate that the method can address the convergence issue of dynamic response for FSDI of structures in the water after a finite number of iterations. Moreover, regarding the hydrodynamic force as a physical substructure helps prevent errors arising from repeated loading processes, enabling the benefits of the OI-RTHS method. This study offers potential insights for the research on the FSDI of structures, also other environmental loadings.
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基于离线迭代的实时混合模拟,用于受地震激励结构中的高保真流固动力相互作用
本研究介绍了一种基于离线迭代的实时混合模拟(OI-RTHS)方法,这是一种模拟地震激励下流体-结构动力相互作用(FSDI)的新方法。采用这种方法,流体动力被视为物理子结构,而数值计算和伺服加载则在地震事件的整个持续时间内独立进行。通过迭代修正输入指令信号,并在每次迭代过程中获得输出响应信号,最终实现边界的平衡协调。这一特点引入了真实的流体力学数据,解决了纯数值理论分析的局限性,确保了高保真度。此外,它还减少了数值计算与伺服加载之间的实时通信需求,从而降低了硬件和软件要求。本研究对所提出的方法进行了实验验证,结果表明该方法可以在有限次迭代后解决水中结构 FSDI 动态响应的收敛问题。此外,将水动力视为物理子结构有助于防止重复加载过程产生的误差,从而实现 OI-RTHS 方法的优势。这项研究为结构的 FSDI 以及其他环境荷载的研究提供了潜在的启示。
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来源期刊
Computers & Structures
Computers & Structures 工程技术-工程:土木
CiteScore
8.80
自引率
6.40%
发文量
122
审稿时长
33 days
期刊介绍: Computers & Structures publishes advances in the development and use of computational methods for the solution of problems in engineering and the sciences. The range of appropriate contributions is wide, and includes papers on establishing appropriate mathematical models and their numerical solution in all areas of mechanics. The journal also includes articles that present a substantial review of a field in the topics of the journal.
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