Effects of the Structural Identification on the Appearance of Multiple Solutions in Model Updating
Publication: Structures Congress 2009: Don't Mess with Structural Engineers: Expanding Our Role
Abstract
Finite element models are idealistic representations of actual structures and need to be updated in order to represent accurately these real structures. Multiple solutions may arise from the model updating process depending on the complexity of the structural model, the amount of variables involved in the updating process, and the uncertainties in the system identification part. This paper focuses on studying the effects of the uncertainties of modal parameters on the appearance of multiple solutions of posterior density functions used for model updating. In this study different sensor configurations and standard deviations for the natural frequencies and mode shapes are used, in order to show that the appearance of multiple solutions is largely influenced by the system identification uncertainties. The methodology used is based on Baye's probability theorem, which allows us to update a probability distribution based on data obtained and a prior knowledge of the system.
Get full access to this article
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Computing in civil engineering
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Mathematics
- Methodology (by type)
- Model accuracy
- Models (by type)
- Motion (dynamics)
- Numerical methods
- Parameters (statistics)
- Probability
- Solid mechanics
- Statistics
- Structural engineering
- Structural models
- Structural system identification
- Structural systems
- Uncertainty principles
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.