Updating for Model-Based Simulation

更新基于模型的仿真

• 批准号: 0200019
• 负责人: Daniel Inman
• 金额: $ 22.5万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0200019&HistoricalAwards=false
• 关键词: Updating; Model; Based; Simulation

Daniel J. InmanVirginia TechProposal Number: 0200019Proposal Title "Updating for Model-Based Simulation" Project Abstract The general aim of the research is to develop improved methods of model updating for normal and damped flexible structures. The improvement is expected to be in the algorithms themselves, in the numerical schemes that will realize them, and in tools for evaluating the outcome of the updating method. Specific issues that will be investigated are: Obtaining a physically meaningful updated model using reference basis model method. Mode shape correction and order matching. Deterministic and stochastic sensitivity analysis. Robust updating and reliability issues. Method validation and improvement by experiment.The intellectual contribution is twofold. From a theoretical point of view such modification of the reference basis method has a clear scientific merit. Secondly, each one of the indicated issues corresponds to a genuine practical problem facing industries seeking model-based simulation. Solution of these will lead to better modeling and understanding of vibrating systems. To be more specific, it is our belief that the parametric reference basis method is a very promising approach to model updating and with the appropriate tuning it will perform better than any other method.The proposed effort is expected to impact industry by providing algorithms to provide accurate simulation models, a long-standing problem of importance. Secondly, the proposed effort will improve graduate training of underrepresented groups, involve undergraduates in research and promote the pursuit of academic careers.

提案题目“基于模型的仿真更新”项目摘要本研究的总体目标是发展改进的正态和阻尼柔性结构的模型更新方法。预计改进将在算法本身，在将实现它们的数值格式中，以及在评估更新方法结果的工具中。具体研究的问题是：使用参考基模型方法获得物理上有意义的更新模型。模态形状校正和阶次匹配。确定性和随机敏感性分析。健壮的更新和可靠性问题。通过实验对方法进行验证和改进。智力贡献是双重的。从理论角度看，这种对参考基方法的修正具有明显的科学价值。其次，所指出的每一个问题都对应于寻求基于模型的仿真的行业所面临的一个真正的实际问题。这些问题的解决将有助于更好地建模和理解振动系统。更具体地说，我们相信参数参考基方法是一种非常有前途的模型更新方法，并且通过适当的调整，它将比任何其他方法执行得更好。通过提供提供精确仿真模型的算法，这一长期存在的重要问题有望对行业产生影响。其次，拟议的努力将改善对代表性不足群体的研究生培训，让本科生参与研究，并促进对学术事业的追求。