FROM FE MODEL UPDATING TO MODEL VALIDATION:ADVANCES IN MODELING OF DYNAMIC STRUCTURES
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摘要:结构动力学有限元建模精度问题是力学分支中受到广泛关注的研究课题之一. 以提高建模精度为目标的有限元模型修正技术的发展日臻完善, 并已逐步在工业界得到应用. 然而模型修正技术未能全面解决建模精度中存在的问题. 近几年以美国三大国家实验室为代表的科技人员提出了模型确认技术, 以希望全面解决结构动力学建模精度问题. 本文以模型修正为基础, 讨论模型确认的相关问题以及与模型修正的关系.Abstract:The accuracy of a finite element model is important instructural dynamic predictions. The well-developed model updating techniqueaims to improve the accuracy of the prediction and is beginning to be used inindustry. But the model updating technique does not work well in cases with non-linearity or model uncertainties. The model validationproposed in the end of the 20th century is to see how accurately thecomputational models can represent the real world in a realistic way.In this paper, the model validation and its relevant issues arediscussed with respect to the model updating technique.
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