Dynamic characterization of elastomers and identification with rheological models

Abstract The aim of the present paper is identifying a methodology of study, valid for elastomers in general, in order to experimentally characterize their dynamic behaviour and simulating this behaviour by means of a structured mathematical model. An elastomer was chosen and its equivalent stiffness and equivalent viscous damping coefficient were experimentally determined using a specifically designed test apparatus. The responses to several sinusoidal excitations, characterized by different amplitude and frequency values, were analyzed. Furthermore, different values of static preload applied to the elastomer were considered. The experimental values were reproduced using an equivalent 13 degrees-of-freedom rheological model, optimized through a genetic algorithm.

[1]  A. K. Mallik,et al.  Performance of Non-linear Vibration Isolators Under Harmonic Excitation , 1994 .

[2]  Rajendra Singh,et al.  CHARACTERIZATION OF RUBBER ISOLATOR NONLINEARITIES IN THE CONTEXT OF SINGLE- AND MULTI-DEGREE-OF-FREEDOM EXPERIMENTAL SYSTEMS , 2001 .

[3]  David Thompson,et al.  Developments of the indirect method for measuring the high frequency dynamic stiffness of resilient elements , 1998 .

[4]  Lawrence. Davis,et al.  Handbook Of Genetic Algorithms , 1990 .

[5]  Claude-Henri Lamarque,et al.  Study of some rheological models with a finite number of degrees of freedom , 2000 .

[6]  Vladimir Palmov.  Vibrations of elasto-plastic bodies , 1998 .

[7]  David E. Goldberg,et al.  Genetic Algorithms in Search Optimization and Machine Learning , 1988 .

[8]  Yi-Qing Ni,et al.  IDENTIFICATION OF NON-LINEAR HYSTERETIC ISOLATORS FROM PERIODIC VIBRATION TESTS , 1998 .

[9]  M. S. Koval'chenko.  Dynamics of Uniaxial Tension of a Viscoelastic Strain-Hardening Body in a System with One Degree of Freedom. Part 4. Action of an External Force on a Compound Body , 2001 .

[10]  J. D. Dickens,et al.  Phase Velocity of Rubber Element in Vibration Isolator Under Static Load , 2000 .

[11]  H. Hatwal,et al.  ON THE MODELLING OF NON-LINEAR ELASTOMERIC VIBRATION ISOLATORS , 1999 .

[12]  M Berg.  A model for rubber springs in the dynamic analysis of rail vehicles , 1997 .

[13]  J. D. Dickens.  DYNAMIC MODEL OF VIBRATION ISOLATOR UNDER STATIC LOAD , 2000 .

[14]  Nostrand Reinhold,et al.  the utility of using the genetic algorithm approach on the problem of Davis, L. (1991), Handbook of Genetic Algorithms. Van Nostrand Reinhold, New York. , 1991 .