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An improved computational procedure for determining helicopter rotor blade natural modes
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mineck, R. E. Weller, W. H. |
| Copyright Year | 1978 |
| Description | An existing computer program, used for predicting the natural frequencies and mode shapes of helicopter rotor blades, was refined to improve program accuracy and versatility. The program is based on the Holzer-Myklestad approach adapted for rotating beams. Coupled vertical (out-of-plane), horizontal (in-plane), and torsional mode characteristics were determined for a variety of hub and blade configurations. The resulting program is documented by presenting the recursion equations and techniques for determining natural frequencies and mode shapes, input data requirements, and descriptions of various program outputs. The accuracy of the program is demonstrated by comparing computed results with exact solutions to classical problems and experimental data. |
| File Size | 4735200 |
| Page Count | 88 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780023849 |
| Archival Resource Key | ark:/13960/t0ms8hv55 |
| Language | English |
| Publisher Date | 1978-08-01 |
| Access Restriction | Open |
| Subject Keyword | Computer Programming And Software Aerodynamic Configurations Resonant Frequencies Helicopter Propeller Drive Vibration Mode Rotor Blades Hubs Rotary Wings Computer Programs 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 |
