Title: Reallocation of system mass and stiffness for achieving target specifications using a superelement/substructuring methodology

Authors: Peter Avitabile, Hiromichi Tsuji, John O'Callahan, James P. DeClerck

Addresses: Modal Analysis and Controls Laboratory, University of Massachusetts Lowell, Lowell, MA, USA. ' Modal Analysis and Controls Laboratory, University of Massachusetts Lowell, Lowell, MA, USA. ' Modal Analysis and Controls Laboratory, University of Massachusetts Lowell, Lowell, MA, USA. ' Noise and Vibration Center, General Motors Corporation, Milford, MI, USA

Abstract: Optimisation of models using desired targets is typically performed at the system level and result from the individual component dynamic characteristics. Optimisation can be performed when the component and system topology is defined. Previous work utilised Analytical Model Improvement techniques along with Localisation of Model Change procedures to determine the component target characteristics. However, the use of superelements or reduced component representations presents complications since no topology exists for these representations. The efforts in this work are directed towards the implementation of the technique using superelements as the component description. The topology of the superelement is mapped with an arbitrary array of simplistic elements to determine the distribution of mass and stiffness necessary to achieve the performance goals specified without allowing smearing to adjacent component interconnection regions.

Keywords: design optimisation; model updating; inverse processing; modal optimisation; cascaded targets; superelements; substructuring; system mass; system stiffness; topology; system models; component models; system performance.

DOI: 10.1504/IJVNV.2005.007529

International Journal of Vehicle Noise and Vibration, 2005 Vol.1 No.3/4, pp.307 - 327

Available online: 02 Aug 2005 *

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