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Development of a Faster and More Accurate Model Modification Method for Dynamic Characteristics Prediction of Large Finite Element Models
Published May 01, 2006 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The model scale of the finite element method is so large in late years, it is required to find a method which can be applied to the optimal analysis to minimize the calculation time for dynamic characteristics in changing the structure. We develop here a new perturbation method with complimentary term which is effective to this purpose. Here we show by both numerical and theoretical analysis that the accuracy of the estimate is greatly improved even without the lower modes, by using the complementary vector adjusted to the structure change and input style, which is obtained by Ma-Hagiwara modal method. We can show the possibility by using the method proposed here to reduce the analysis time drastically even when the structure is largely changed in a big model.