Implementation of SEREP Into LLNL Dyna3d for Global/Local Analysis

Report No. ARL-TR-3569
Authors: David A. Hopkins and Michael A. Minnicino II
Date/Pages: August 2005; 34 pages
Abstract: Reduction methods are used to reduce the number of degrees of freedom in a finite-element (FE) model at the expense of highfidelity solutions. The System Equivalent Reduction/Expansion Process (SEREP) is an attractive reduction technique since it can preserve the modal fidelity of the FE model up to a user-defined level. This capability allows for a more accurate representation of the physical structure. In this report, the feasibility of incorporating SEREP in the FE method for both discrete spring-mass-damper and distributed systems is explored. Modeling and numerical issues related to using SEREP as a superelement technique are examined and discussed.
Distribution: Approved for public release
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Last Update / Reviewed: August 1, 2005