COLA2: A Computer Program for the Structural Synthesis of Two Components Using General Modal Coordinates

摘要

The COLA2 computer program was developed as part of the Mechanical Engineering Research Project named ''Structural Control Technology Research''. This computer program was developed because of the need to perform substructured modeling within the research project. COLA2 performs a component mode synthesis for two linear elastic components using modes that are more general than the structural eigenmodes; that is, Lanczos coordinates eigenmodes, static vectors, or other vectors for mode reduction can be used. Data for COLA2 is calculated using the GEMINI linear elastic finite element computer code. Besides the synthesis capability, COLAS also has a dynamic response simulation capability that may be executed concurrently with the component mode synthesis or with a restart execution. COLA2 can be executed on the CRAY-1 computers at the Livermore Computer Center. An example showing the component model synthesis for a two-dimensional problem is presented along with the associated modal time history simulation. Another example, which is performed using the GEMINI code but which is capable of being performed with COLA2 given a two-component modal representation, is also presented to show simulation capabilities that use constant gain control forces. 10 refs., 9 figs., 5 tabs. (ERA citation 13:002762)