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Correlation of ah-1g airframe flight vibration data with a coupled rotor-fuselage analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sangha, K. Shamie, J. |
| Copyright Year | 1990 |
| Description | The formulation and features of the Rotor-Airframe Comprehensive Analysis Program (RACAP) is described. The analysis employs a frequency domain, transfer matrix approach for the blade structural model, a time domain wake or momentum theory aerodynamic model, and impedance matching for rotor-fuselage coupling. The analysis is applied to the AH-1G helicopter, and a correlation study is conducted on fuselage vibration predictions. The purpose of the study is to evaluate the state-of-the-art in helicopter fuselage vibration prediction technology. The fuselage vibration predicted using RACAP are fairly good in the vertical direction and somewhat deficient in the lateral/longitudinal directions. Some of these deficiencies are traced to the fuselage finite element model. |
| File Size | 2640881 |
| Page Count | 228 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900019549 |
| Archival Resource Key | ark:/13960/t93828b8c |
| Language | English |
| Publisher Date | 1990-08-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Finite Element Method Rotor Dynamics Momentum Theory Vibration Impedance Matching Airframes Transfer Functions Wakes Fuselages Mathematical Models Ah-1g Helicopter Nastran 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 |
