Dynamic analysis of systems having large damping variations

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In the earthquake response analysis of structures in which the damping characteristics between the elements varies significantly the standard mode superposition method cannot be used. Several approximations have been proposed that allow the application of the modal superposition method for cases in which the damping matrix is not orthogonal with respect to the modal shapes. The most commonly used approximation is based on a composite damping value which is employed in the modal equations. This value is a weighted average of the damping values of the individual components of the structural model. In this paper an investigation of the errors ... continued below

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Pages: 8

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Philippacopoulos, A.J. January 1, 1985.

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Description

In the earthquake response analysis of structures in which the damping characteristics between the elements varies significantly the standard mode superposition method cannot be used. Several approximations have been proposed that allow the application of the modal superposition method for cases in which the damping matrix is not orthogonal with respect to the modal shapes. The most commonly used approximation is based on a composite damping value which is employed in the modal equations. This value is a weighted average of the damping values of the individual components of the structural model. In this paper an investigation of the errors introduced by the composite damping in the response of simple structures is presented. The results given in the paper can be used for benchmarking the approximations in more complex systems for which composite damping solutions are employed.

Physical Description

Pages: 8

Notes

NTIS, PC A02/MF A01 - GPO.

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  • ASME pressure vessel and piping division conference, New Orleans, LA, USA, 24 Jun 1985

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  • Other: TI85012190
  • Report No.: BNL-NUREG-36471
  • Report No.: CONF-850670-17
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 5715974
  • Archival Resource Key: ark:/67531/metadc1093085

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Office of Scientific & Technical Information Technical Reports

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1985

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 24, 2018, 1:21 p.m.

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Philippacopoulos, A.J. Dynamic analysis of systems having large damping variations, article, January 1, 1985; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1093085/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.