Frequency Window Implementation of Adaptive Multi-Level Substructuring

[+] Author and Article Information
J. K. Bennighof, M. F. Kaplan

Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, Texas

J. Vib. Acoust 120(2), 409-418 (Apr 01, 1998) (10 pages) doi:10.1115/1.2893845 History: Received November 01, 1995; Online February 26, 2008


Adaptive multi-level substructuring (AMLS) is a method for reducing the order of a complex structure’s finite element model by orders of magnitude, while ensuring that the accuracy available from the original model is preserved. A structure’s finite element model is transformed to a much more efficient representation in terms of approximate vibration modes for substructures on multiple levels. An adaptive procedure constructs an optimal model for satisfying a user-specified error tolerance, by determining which modes should be included in the model. In this paper, a frequency window implementation of AMLS is developed, in which frequency response analysis can be done over a frequency window at little additional cost beyond that of the center frequency solution. A numerical example is presented.

Copyright © 1998 by The American Society of Mechanical Engineers
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