GARTEUR有限元模型修正与确认研究

 待修正参数的选择以及修正后模型的质量评估是有限元模型修正的两个重要问题。以欧洲学术界广泛采用的GARTEUR飞机模型为例,利用基于灵敏度分析的模型修正方法,通过仿真算例研究参数选择对模型修正质量的影响,并以试验数据为目标值对有限元模型进行修正与确认。为全面评估模型的修正质量,引入三级标准对修正后有限元模型进行确认。

Case Study of FE Model Updating and Validation via an Aircraft Model Structure

Parameter selection and quality validation are of great importance in finite element model updating. This paper presents some results which demonstrate the relationship between parameter selection and updated model's quality through simulation cases. Three quality levels with corresponding validation criteria are employed with an emphasis on updated model's prediction ability. Results of updating based on experimental modal test data are shown as an application example. An aircraft test structure, GARTEUR, which is generally utilized in Europe, is employed in both the simulation case and the experimental case. Sensitivity-based model updating approach is applied.