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DINAME 2017
XVII International Symposium on Dynamic Problems of Mechanics
THE DEVELOPMENT OF A EXPERIMENTAL APPARATUS FOR ANALYSIS OF THE ZENER MODEL WITH NONLINEAR ELEMENTS
Submission Author:
Lucas De Haro Silva , SP
Co-Authors:
Lucas De Haro Silva, Paulo José Paupitz Gonçalves
Presenter: Lucas De Haro Silva
doi://10.26678/ABCM.DINAME2017.DIN17-0133
Abstract
The reduction of noise and vibration in mechanical applications has been an important subject related to safety and comfort in various systems. Part of the problem involving vibration and noise is related to the concept of transmissibility. For the linear systems, its concepts can be the displacement and the force transmissibility. The first relates the amount of displacement (or velocity or acceleration) that is convert in displacement in a second system. A typical example of such concept is the linear mass-spring-damper system subject to base excitation. In this case, the spring damper set is defined as an isolator set. The objective of isolators is to filter the excitation from a source (base motion) from reaching a receiver (mass). It is know that viscoelastic isolators presents good isolation characteristics, especially for high frequencies. A model that is generally used to represent the viscoelastic behavior of systems is the Zener Model. This model, also known as the standard linear solid (SLS) model, is a simple and complete method of modeling the behavior of a viscoelastic material using a linear combination of springs and dashpots (dampers) to represent elastic and viscous components, respectively. Often, similar models, such as the Maxwell, which is defined by a spring in series with a damper, and the Kelvin-Voigt model, which is defined by a spring in parallel with a damper, are used. However, these models are often proved insufficient for the representation of materials which exhibit viscoelastic rheology. Thus, the Maxwell model does not describe creep or recovery, and the Kelvin-Voigt model does not describe stress relaxation. SLS is the simplest model that predicts both phenomena, which makes it also a complete model. This paper will investigate the linear Zener model and a experimental apparatus is developed to represent the behavior of the structure, in the experiment will be analyzed stiffness, damping and natural frequencies of the structure.
Keywords
Zener model, nonlinear spring
