This paper presents several examples of tire vibration analysis under different loads, inflation pressures, and excitation modes. Several consecutive structural resonant modes were also analysed 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 3D 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 condition. 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. The unique capabilities of HI were also applied to studies of the surface shock wave propagation in the tire carcass and sidewall. Several examples of different dynamic response of the tire due to changing experimental conditions are presented.
The overall breast cancer mortality rate has remained unchanged the last 50 years. The most significant factor in the treatment is its early detection which will alter the mortality rate. In this investigation, the feasibility of holographic interferometry for the purpose of detecting breast cancer was examined. Optical setups were developed to enable the collection of holographic interferograms in vivo of asymptomatic breasts and those containing cancerous lesions. Different stressing concepts of holographic nondestructive testing and their applicability for the detection of breast cancer were tested.