Updating for Model-Based Simulation

丹尼尔·J·英曼维吉尼亚理工学院编号：0200019建议题为“基于模型的仿真更新”项目摘要本研究的总体目标是为正常和受阻的柔性结构发展改进的模型修正方法。预计改进将在算法本身、将实现这些算法的数值方案以及评估更新方法结果的工具方面进行。将研究的具体问题是：使用参考基模型方法获得物理上有意义的更新模型。振型修正和阶比匹配。确定性和随机性敏感性分析。健壮的更新和可靠性问题。方法通过实验验证和改进，智力贡献是双重的。从理论上看，这种对参考基准法的修改具有明显的科学价值。其次，所指出的每一个问题都与寻求基于模型的模拟的行业面临的一个真正的实际问题相对应。这些问题的解决将导致对振动系统更好的建模和理解。更具体地说，我们相信参数参考基法是一种非常有前途的模型更新方法，通过适当的调整，它将比任何其他方法执行得更好。拟议的努力预计将通过提供提供准确模拟模型的算法来影响行业，这是一个长期存在的重要问题。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。

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.