Component Model Reduction in Flexible Multibody Systems
Abstract
The use of multibody simulation programs for the study of large displacement motions of systems of flexible bodies adds another dimension to the model reduction problem. In general, straightforward criteria are available for performing model reduction at the system level; however, simulation codes normally require modal data input for each component body of a system rather than for the system as a whole. It is thus always necessary to determine the modes to be retained for each component based on knowledge of the system modes of interest. The method presented in this report for component model reduction utilizes submatrices of the system modal matrix as transformation matrices used to accomplish the first phase of a two phase matrix diagonalization process. This method is systematic and, as demonstrated above using simple mass-spring systems, the method gives very accurate results. The method has also been tested on a model of the Galileo spacecraft, and gave excellent results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 18, 1991
- Accession Number
- ADA251691
Entities
People
- Estelle M. Eke
- Fidelis O. Eke
Organizations
- Tuskegee University