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Updating the finite element model of the aerostructures test wing using ground vibration test data
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lung, Shun-Fat Pak, Chan-Gi |
| Copyright Year | 2009 |
| Description | Improved and/or accelerated decision making is a crucial step during flutter certification processes. Unfortunately, most finite element structural dynamics models have uncertainties associated with model validity. Tuning the finite element model using measured data to minimize the model uncertainties is a challenging task in the area of structural dynamics. The model tuning process requires not only satisfactory correlations between analytical and experimental results, but also the retention of the mass and stiffness properties of the structures. Minimizing the difference between analytical and experimental results is a type of optimization problem. By utilizing the multidisciplinary design, analysis, and optimization (MDAO) tool in order to optimize the objective function and constraints; the mass properties, the natural frequencies, and the mode shapes can be matched to the target data to retain the mass matrix orthogonality. This approach has been applied to minimize the model uncertainties for the structural dynamics model of the aerostructures test wing (ATW), which was designed and tested at the National Aeronautics and Space Administration Dryden Flight Research Center (Edwards, California). This study has shown that natural frequencies and corresponding mode shapes from the updated finite element model have excellent agreement with corresponding measured data. |
| File Size | 11910629 |
| Page Count | 43 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090019743 |
| Archival Resource Key | ark:/13960/t3tt9m27g |
| Language | English |
| Publisher Date | 2009-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aeronautics (general) Nasa Programs Dynamic Structural Analysis Ground Tests Wings Resonant Frequencies Decision Making Vibration Tests Certification Tuning Multidisciplinary Design Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
