Transfer-Function-Based Criteria for Decoupling of Secondary Systems
New criteria for decoupling of primary-secondary systems have been recently proposed by the first writer. They are defined by a limited variation of the maximum transfer function of a secondary system that is connected to a single-degree-of-freedom primary-secondary system. In this paper, their sufficiency for decoupling is investigated when the two-degree-of-freedom primary-secondary system is subjected to a filtered white noise process of the Kanai-Tajimi power spectrum. Verifications for sufficiency of the new criteria are extended to a secondary system mounted to a multi-degree-of-freedom primary system. Effects of site condition on the criteria are also studied, by varying the characteristic frequency of the Kanai-Tajimi spectrum. The upper-bound mass ratios resulting from the criteria, above which a coupled analysis is required, are compared with the current decoupling criteria mainly used in the design of nuclear facilities. Revisions of the current decoupling criteria are suggested as a result of this study. A simple procedure is recommended and illustrated by an example to apply the new criteria into the analysis and design of secondary systems.
G. Chen and J. Wu, "Transfer-Function-Based Criteria for Decoupling of Secondary Systems," Journal of Engineering Mechanics, vol. 125, no. 3, pp. 340-346, American Society of Civil Engineers (ASCE), Mar 1999.
The definitive version is available at https://doi.org/10.1061/(ASCE)0733-9399(1999)125:3(340)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Degrees Of Freedom (Mechanics); Spectrum Analysis; Transfer Functions; White Noise; Kanai-Tajimi Power Spectrum; Dynamics
International Standard Serial Number (ISSN)
Article - Journal
© 1999 American Society of Civil Engineers (ASCE), All rights reserved.
01 Mar 1999