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Reduced uncertainties in the flutter analysis of the aerostructures test wing (Document No: 20110011618)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lung, Shun Fat Pak, Chan-Gi |
| Copyright Year | 2011 |
| Description | Tuning the finite element model using measured data to minimize the model uncertainties is a challenging task in the area of structural dynamics. A test validated finite element model can provide a reliable flutter analysis to define the flutter placard speed to which the aircraft can be flown prior to flight flutter testing. Minimizing the difference between numerical and experimental results is a type of optimization problem. Through the use of the National Aeronautics and Space Administration Dryden Flight Research Center's (Edwards, California) multidisciplinary design, analysis, and optimization tool to optimize the objective function and constraints; the mass properties, the natural frequencies, and the mode shapes are matched to the target data, and the mass matrix orthogonality is retained. The approach in this study has been applied to minimize the model uncertainties for the structural dynamic model of the aerostructures test wing, which was designed, built, and tested at the National Aeronautics and Space Administration Dryden Flight Research Center. A 25 percent change in flutter speed has been shown after reducing the uncertainties. |
| File Size | 9211545 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110011618 |
| Archival Resource Key | ark:/13960/t9z08454t |
| Language | English |
| Publisher Date | 2011-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Nasa Programs Dynamic Response Dynamic Structural Analysis Finite Element Method Flight Tests Wings Vibration Mode Dynamic Models Flutter Analysis Design Analysis Tuning Multidisciplinary Design Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
