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Dynamic analysis of pretwisted elastically-coupled rotor blades
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hinnant, Howard E. Nixon, Mark W. |
| Copyright Year | 1994 |
| Description | The accuracy of using a one-dimensional analysis to predict frequencies of elastically-coupled highly-twisted rotor blades is addressed. Degrees of freedom associated with shear deformation are statically condensed from the formulation, so the analysis uses only those degrees of freedom associated with classical beam theory. The effects of cross section deformation (warping) are considered, and are shown to become significant for some types of elastic coupling. Improved results are demonstrated for highly-coupled blade structures through account of warping in a local cross section analysis, without explicit inclusion of these effects in the beam analysis. A convergence study is also provided which investigates the potential for improving efficiency of elastically-coupled beam analysis through implementation of a p-version beam finite element. |
| File Size | 1452814 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940020366 |
| Archival Resource Key | ark:/13960/t2k69db6f |
| Language | English |
| Publisher Date | 1994-01-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Finite Element Method Shear Properties Degrees of Freedom Deformation Beams Supports Warpage Rotor Blades Composite Structures Rotary Wings Convergence Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
