A procedure is presented for applying modern modal analysis tools in the area of structural dynamic design and analysis for the purpose of minimizing the required development time necessary to bring a product to the marketplace. Development time is minimized by reducing the number of design, build, and test iterations required to bring a product concept into production. This is done by using available modal analysis tools in a coordinated manor to generate a good understanding of the behavior of the design in the first development iteration. The finite element method and experimental modal analysis are used for design optimization and design verification. In addition, the finite element method is used to provide information which will ensure good quality results in the experimental stage. The experimental results are then used, with the aid of modal correlation techniques, to refine the finite element model and to eliminate inaccuracies in the model. The refined finite element model is then used to predict the impact of changes to the design which are required in order to fulfill the design's performance requirements. A modal test structure is analyzed and tested, and the results are presented, in order to illustrate the coordinated use of the modal analysis tools.
Library of Congress Subject Headings
NASTRAN; Structural analysis (Engineering)--Matrix methods--Data processing; Engineering design--Data processing; Modal analysis; Finite element method
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Department, Program, or Center
Mechanical Engineering (KGCOE)
Perconti, James, "Practical application of modal analysis techniques" (1992). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus