A critique of mode acceleration and modal truncation augmentation methods for modal response analysis

The mode acceleration and modal truncation augmentation methods used in modal response analyses are reviewed in detail. The rationale for using the methods is examined and a theoretical relationship between the two methods is developed. The methods are compared with a small numerical example problem...

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Bibliographic Details
Published in:Computers & structures 1997-03, Vol.62 (6), p.985-998
Main Authors: Dickens, J.M., Nakagawa, J.M., Wittbrodt, M.J.
Format: Article
Language:English
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Summary:The mode acceleration and modal truncation augmentation methods used in modal response analyses are reviewed in detail. The rationale for using the methods is examined and a theoretical relationship between the two methods is developed. The methods are compared with a small numerical example problem by evaluating the dynamic response of a structure for a harmonic loading and a time domain loading. The modal truncation augmentation method is found to be superior to the mode acceleration method for both implementation and quality of results.
ISSN:0045-7949
1879-2243
DOI:10.1016/S0045-7949(96)00315-X