The Use of Complex Stiffnesses for Hysteretic Damping

Abstract

This technical treatise has exemplified a response spectrum method that is particularly suited for spring-mass-damping systems excited by one or more base or ground disturbances characterized by displacements. It offers an alternative to the conventional response spectrum method, which is best suited for a single prescribed ground acceleration. This methodology has also introduced a method of how to incorporate hysteretic damping through complex spring stiffness. When the formulation is expressed via base displacements, a simpler application of the response spectrum method to varying spring-mass systems with attendant input excitations can be realized as expressed as the ratio of energy considerations inherent in the natural physics of the phenomena itself.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1998
Accession Number
ADA359327

Entities

People

  • T. A. Korjack

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Applied Mechanics
  • Complex Numbers
  • Displacement
  • Equations
  • Excitation
  • Frequency
  • Gas Turbines
  • Mechanical Engineering
  • Military Research
  • Modal Analysis
  • Numbers
  • Numerical Analysis
  • Shock Response Spectra
  • Spectra
  • Stiffness
  • Turbines
  • Vibrational Spectra

Fields of Study

  • Engineering

Readers

  • Control Systems Engineering.
  • Systems Analysis and Design