Novel Computational Simulation Methodology for Complex Structural System Analysis

用于复杂结构系统分析的新型计算仿真方法

• 批准号: 0826513
• 负责人: Sashi Kunnath
• 金额: $ 26万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-10-01 至 2012-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0826513&HistoricalAwards=false
• 关键词: Novel; Computational; Simulation; Methodology; Complex

This project will establish a new structural engineering computation paradigm by developing a novel meshfree simulation methodology for the analysis of complex structural systems. Inelastic large deformations, and material separation and complex failure modes are special features of structural response in performance-based limit states, and existing finite element technology has proven to be inadequate to address these features efficiently in structural design simulations. Thus, there is a need to explore and develop new tools to efficiently analyze and accurately predict the performance of structures in the era of simulation-based design of the civil infrastructure for unconventional loads with large deformation response. The adoption of maximum-entropy meshfree methods in conjunction with stable nodal-integration schemes within a co-rotational formulation is conceived to overcome the current limitations of finite elements. Outcomes from the project include a new methodology to facilitate the assessment of existing infrastructure to extreme loads and procedures to enable simulation-based structural design.The outcome of this research effort will spur new innovative methods to deal with nonlinear analysis of complex structural systems subjected to extreme loads such as earthquakes, blast and impact. External collaboration with researchers at the National Institute of Standards and Technology will provide an excellent opportunity to initiate graduate student exchange and hence enable the development of a strong foundation in experimentation and simulations for improved design of structural systems. The project also includes an educational component that seeks to introduce undergraduates and K-12 students to exciting and emerging methods in structural computation thereby encouraging them to pursue careers in structural engineering and eventually contribute to the national effort to preserve and protect the nation?s infrastructure.

本计画将建立一个新的结构工程计算范例，发展一种新的无网格模拟方法来分析复杂的结构系统。非弹性大变形、材料分离和复杂失效模式是基于性能的极限状态下结构响应的特殊特征，现有的有限元技术已被证明不足以在结构设计模拟中有效地解决这些特征。因此，有必要探索和开发新的工具，以有效地分析和准确地预测结构的性能，在基于仿真的设计的民用基础设施的非常规负载与大变形响应的时代。采用最大熵无网格方法结合稳定的积分方案内的共同旋转制定的设想，以克服目前的有限元素的局限性。该项目的成果包括一种新的方法，以促进评估现有基础设施的极端负荷和程序，使基于模拟的结构设计。这项研究工作的成果将刺激新的创新方法来处理非线性分析的复杂结构系统受到极端负荷，如地震，爆炸和冲击。与美国国家标准与技术研究所研究人员的外部合作将为启动研究生交流提供一个极好的机会，从而为改进结构系统的设计奠定坚实的实验和模拟基础。该项目还包括一个教育部分，旨在向本科生和K-12学生介绍结构计算中令人兴奋和新兴的方法，从而鼓励他们从事结构工程职业，并最终为维护和保护国家的国家努力做出贡献。的基础设施。