Spatial-Domain Techniques for Finite Element Model Updating Via Laser-Based Experimental Modal Analysis

这个美国-巴西合作科学奖将 支持拉里·米切尔的合作， 弗吉尼亚理工学院和州立 大学和J. Roberto F.阿鲁达 巴西的Universidade Estadual de Campinas 该项目旨在调查使用 空间密集的实验响应数据， 更新有限元（FE）模型， 同样的结构。 研究人员将使用一种独特的扫描方法 激光多普勒测速仪（LDV）测量 响应图像高达65，000多个点， 为了发展空间， 用于LDV数据缩减的域技术， 模态参数提取 这些方法将 用于更新有限元模型， 预测与测量结果更接近 数据 这项工作将首次， 允许空间上详细的实验数据， 帮助定义FE模型中的缺陷， 为空间密集型数据提供基础， 用于提取基于实验的模态 参数 美国方面有一个激光设备 和实验测量专业知识， 模态测试场景 巴西集团已 将FE方法应用于动态 结构建模与实验模型 测试经验。 ***//

This U.S.-Brazil Cooperative Science award will support the collaboration of Larry Mitchell of Virginia Polytechnic Institute and State University and J. Roberto F. Arruda of the Universidade Estadual de Campinas in Brazil. The project aims to investigate the use of spatially dense experimental response data to update the finite element (FE) model describing that same structure. The researchers will use a unique scanning Laser Doppler Velocimeter (LDV) to measure a response image at up to over 65,000 points on the structure, in order to develop spatial- domain techniques for LDV data reduction and modal parameter extraction. These methods will be used to update the FE model so that its predictions more closely match the measured data. This work will, for the first time, allow spatially detailed experimental data to help define defects in the FE models and provide a basis for spatial-intensive data to be used to extract experimentally based modal parameters. The U.S. side has a laser facility and experimental measurement expertise in a modal test scenario. The Brazil group has capabilities in applying FE methods to dynamic structural modeling and experimental modal testing experience. ***//