A substructure coupling procedure applicable to general linear time-invariant dynamic systemsA substructure synthesis procedure applicable to structural systems containing general nonconservative terms is presented. In their final form, the non-self-adjoint substructure equations of motion are cast in state vector form through the use of a variational principle. A reduced-order model for each substructure is implemented by representing the substructure as a combination of a small number of Ritz vectors. For the method presented, the substructure Ritz vectors are identified as a truncated set of substructure eigenmodes, which are typically complex, along with a set of generalized real attachment modes. The formation of the generalized attachment modes does not require any knowledge of the substructure flexible modes; hence, only the eigenmodes used explicitly as Ritz vectors need to be extracted from the substructure eigenproblem. An example problem is presented to illustrate the method.
Document ID
19840048915
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Howsman, T. G. (Control Dynamics Co. Huntsville, AL, United States)
Craig, R. R., Jr. (Texas, University Austin, TX, United States)