Dynamic response simulation of structural systems incorporating linear viscoelastic damping

Conference · Tue Jul 01 04:00:00 EDT 1997

OSTI ID:485116

Lodhia, B B; Esat, I I ^[1]

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1. Brunel Univ., Uxbridge (United Kingdom)

The aim of this paper is to investigate the most efficient and accurate techniques in the representation viscoelastic damping in structures. The viscoelastic damping is represented via the constitutive equations of a generalized model, which can be incorporated into most analysis techniques. The form of the constitutive equations can be represented by the many mathematical expressions, the most accurate of which are considered in this particular investigation. These being the Prony Series and State Space Formulation. In representing viscoelasticity as an accurate form of the phenomena, the process of materials characterization has to be undertaken, and an accurate technique is outlined and demonstrated under this context. The dynamic response simulation is carried out for a one-degree-of-freedom system, with base excitation and a constrained viscoelastic layer, with its dynamic properties being contiguous with that of butyl rubber. Analysis is carried out in the time and frequency domain, together with the description of the method employed for such domain transfer. It was found that the State Space Representation gave a far more realistic response on the lower base frequencies, than that of the Prony Series, but generally was found to deviate on the basis of a monotone increasing function at higher frequencies.

• OSTI ID: 485116
• Report Number(s): CONF-970146--; ISBN 1-890277-03-7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DAMPING
DEGREES OF FREEDOM
MATHEMATICAL MODELS
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
MITIGATION
RESPONSE FUNCTIONS