EXPERIMENTAL INVESTIGATIONS FOR HIGH FREQUENCY VIBRATION PREDICTION WITH A SEA THEORETICAL MODEL
Statistical energy analysis (SEA) can be used for predicting the distribution of high frequency vibrations and/or noise in a complex structure. However, there are still some problems remaining in practical applications. This paper presents the analysis of the vibrations of a theoretical model based on the SEA program developed by the authors, and the comparison between predicted and experimental results. For the purpose of more accurate experimental results, densely distributed vibration measurement points are used, and computer processing of data transformed by A-D converter is used for experimental data analysis. It was found that the experimental results were generally 60-70 % of those of calculations. Qualitatively, relatively good results have been obtained. Therefore, to achieve more accurate theoretical predictions, it is necessary to improve the accuracy of experiment for comparison, so as to make the SEA method more applicable.
Now a day, more and more enterprises like PSA Peugeot Citroen need a new prototyping approach called virtual prototyping. The efficiency of virtual reality dedicated solutions is closely linked with the simulation and integration quality of different sensory feedbacks in a same system. Here, we present a new visuo-haptic configuration which preserves the performance factors of integrated sensory feedbacks. In addition, we propose a new haptic rendering method for rigid objects manipulation with surface properties (smooth, textures …) and without the well known undesirable effects from traditional methods (uncontrolled friction, sticking effects …). The configuration is evaluated with a first industrial concrete scenario. We also study a second visuo-haptic configuration using a video see-through head mounted display for blind manipulation applications. A second industrial scenario is presented