Development of Experimentally Compatible Subsystem Methods for the Analysis of Aircraft Structures.
Abstract
This study is directed toward the development of experimentally compatible synthesis techniques for the determination of the dynamic characteristics of structures from the characteristics of their components. Based on an assessment of existing methods, selected free-interface component mode methods are utilized for the development. A simple technique is developed by which the residual effects, of truncated substructures' modes, required in forming the synthesis can be directly determined from test data. The data is to be obtained by shaking each of the substructures at a single point. Depending on the type of substructures involved, the inclusion of these residual effects is shown to be very significant in drastically improving the predicted modal shapes and damping of their assembly. A method is also presented for extending the selected synthesis formulations to enable their application to non-proportionally damped substructures. The study summarized in this report clearly demonstrates the feasibility of developing general, experimentally compatible synthesis techniques. Recommendations are included for the generalization and further development of the techniques developed in this study. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1981
- Accession Number
- ADA111242
Entities
People
- Sherif T. Noah
Organizations
- Texas A&M University