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Concepts for a theoretical and experimental study of lifting rotor random loads and vibrations, phase 2
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1968 |
| Description | A comparison with NASA conducted simulator studies has shown that the approximate digital method for computing rotor blade flapping responses to random inputs, tentatively suggested in Phase I Report, gives with increasing rotor advance ratio the wrong trend. Consequently, three alternative methods of solution have been considered and are described: (1) an approximate method based on the functional relation between input and output double frequency spectra, (2) a numerical method based on the system responses to deterministic inputs and (3) a perturbation approach. Among these the perturbation method requires the least amount of computation and has been developed in two forms - the first form to obtain the response correlation function and the second for the time averaged spectra of flapping oscillations. |
| File Size | 1395726 |
| Page Count | 56 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740006643 |
| Archival Resource Key | ark:/13960/t48q0rv1d |
| Language | English |
| Publisher Date | 1968-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
