The vibration suppression optimization of electronic apparatus rack based on design of experiment method

The optimization of the mechanical reliability of the electronic rack is considered to be an important part of the product manufacture. In the present study, we used the FEA method to estimate the nature frequency and mode shape of the rack; in addition, the vibration experiment was used to validate the FEA model. The method of design of experiment (DOE) was then integrated into the optimization framework. Statistical analysis and analysis of variance (ANOVA) were also employed to determine the relationship between experimental conditions and yield levels. The effects of influential factors on nature frequency, mass and dynamic stress were investigated. The systematical and analytical evaluation method of Taguchi quality engineering was introduced to evaluate the optimal experimental conditions and hence to achieve the highest dynamic performance and the best robustness of quality from the least number of the experimental plan. The product which was produced with the optimization level of the DOE experiment passed the durability test. The results show that the method presented is theoretical and practical, and this approach provides a powerful design tool for selecting combination of parameters for optimal anti-vibration performance of the rack.