Abstract
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.
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