1366. Rapidloads - A Preliminary Design Loads Prediction Technique for Aircraft
|Title||1366. Rapidloads - A Preliminary Design Loads Prediction Technique for Aircraft|
|Publication Type||Conference Paper|
|Year of Publication||1980|
|Authors||Curry, A. L.|
|Conference||39th Annual Conference, St. Louis, Missouri, May 12-14|
|Conference Location||St. Louis, Missouri|
|Publisher||Society of Allied Weight Engineers, Inc.|
The timely prediction of aircraft flight loads for use during the early stages of preliminary design continues to be a concern for those charged with this responsibility. There is seldom enough known about the configuration at this point to make use of the latest tools. A majority of the data that is available concerns the complete vehicle only. Information such as weight distributions and air load distributions for the primary components (body, wing, tails) quite often are minimal or non-existent. The procedures and tools available for predicting these distributions are generally complex and require the expenditure of a significant amount of time to obtain the required data. These factors tend to eliminate their use in the early stages of preliminary design when response time is at a premium.
RAPIDLOADS is an outgrowth of the Fighter Aircraft Structural Loads (FASTLODS) program, reference 1. It consists of a set of computer programs controlled by an executive routine. Two modes of operation are available:
Symmetric and antisymmetric flight maneuvers of the following types may be used in the analyses.
The maneuvers may be performed at subsonic and supersonic speeds. Through the use of user selected maneuvers at appropriate "points-in-the-sky", a set of design loads may be produced within a very short time -- usually hours rather than days or weeks. Loads data for the body and each lifting surface (wing, tail, etc.) are in the form of shear, bending moment, and torsion distributions. All loads calculations are based on the assumption that the structure is rigid. These data may be stored on magnetic files for use with other analysis methods.
|Key Words||11. Weight Engineering - Aircraft Estimation|
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