Abstract
Data recovery is a post-processing procedure employed in dynamic analyses to recover the physical response from the modal responses obtained using the mode-displacement method. An enhanced data recovery process can improve accuracy by compensating for the modal truncation errors. The mode-acceleration method is a well-known data recovery technique. However, its domain of application is restricted to problems having a low-frequency band of interest. In this paper, new data recovery methods, the quasi-static data recovery methods, are presented. These new methods are based upon a quasi-static compensation technique that is applicable for any banded frequency domain of interest, with both high- and low-frequency modes truncated. Numerical examples are given to demonstrate the improvements on accuracy and applicability of the proposed method compared with traditional data recovery.
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