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Nonlinear dynamic response of a uni-directional model for the tile/pad space shuttle thermal protection system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Housner, J. M. Edighoffer, H. H. Park, K. C. |
| Copyright Year | 1980 |
| Description | A unidirectional analysis of the nonlinear dynamic behavior of the space shuttle tile/pad thermal protection system is developed and examined for imposed sinusoidal and random motions of the shuttle skin and/or applied tile pressure. The analysis accounts for the highly nonlinear stiffening hysteresis and viscous behavior of the pad which joins the tile to the shuttle skin. Where available, experimental data are used to confirm the validity of the analysis. Both analytical and experimental studies reveal that the system resonant frequency is very high for low amplitude oscillations but decreases rapidly to a minimum value with increasing amplitude. Analytical studies indicate that with still higher amplitude the resonant frequency increases slowly. The nonlinear pad is also responsible for the analytically and experimentally observed distorted response wave shapes having high sharp peaks when the system is subject to sinusoidal loads. Furthermore, energy dissipation in the pad is studied analytically and it is found that the energy dissipated is sufficiently high to cause rapid decay of dynamic transients. Nevertheless, the sharp peaked nonlinear responses of the system lead to higher magnification factors than would be expected in such a highly damped linear system. |
| File Size | 1519467 |
| Page Count | 50 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810005833 |
| Archival Resource Key | ark:/13960/t7jq5sf3m |
| Language | English |
| Publisher Date | 1980-11-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Dynamic Response Thermal Protection Tiles Materials Tests Space Shuttles Mechanical Properties Nonlinearity Vibration Mode Hysteresis 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 |
