Cao W.-B.,Aerospace System Engineering Shanghai Institute |
Zhang M.,Aerospace System Engineering Shanghai Institute |
Luo Y.,Aerospace System Engineering Shanghai Institute |
Liu J.-H.,Aerospace System Engineering Shanghai Institute
Jisuan Lixue Xuebao/Chinese Journal of Computational Mechanics | Year: 2016
With the development of China's aerospace industry, aerospace structures are becoming more complex. Assumptions and simplifications are often used for the finite element model(FEM), such as the connection stiffness of components, the effect of boundary conditions and uncertainty of material properties, therefore, there are some errors in the FEM. Based on the original FEM, the surrogate model can be established by design of experiment(DOE), and the 2-level optimization strategy can be used for model updating, which includes genetic algorithm and Gradient algorithm. On the other hand, before each iteration of model updating, the MAC(Modal Assurance Criterion) should be analyzed automatically, so that there is a match between the FEM model and result of this experiment. Analysis showed that the method has a higher accuracy, and the structural parameters can also be identified by using the method. © 2016, Editorial Office of Chinese Journal of Computational Mechanics. All right reserved.