<title>Pulsed holographic interferometry in predictive tire testing</title>

Abstract

This paper presents several examples of tire vibration analysis under different loads, inflation pressures and excitation modes. Several consecutive structural resonant modes were also analyzed in the frequency range 190 -260 Hz to search for their contribution to a phenomenon called the first resonant frequency of the tire cavity as well as to experimentally determine their contribution to the tire noise spectrum. A Lumonics HLS-2 ruby laser system was used in double exposure mode during the experiments. The capability to precisely map a 3-D displacement vector field is shown through utilization of an image processing system and a simple fringe order tracking procedure.The examples supplied demonstrate that HI can provide very accurate experimental measurement of mode amplitudes to precisely tune FEA tire models under arbitrary boundary conditions. This experimental technique can also be used to measure responses of some 'exotic' materials built into a tire for which the computer models cannot be easily established. 0-8194-1 9044/95/$6.00 SPIE Vol. 2545 /33 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/27/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx