Frequency domain finite element model correction method based on reduced basis
A model correction and finite element technology, applied in the field of dynamic finite element model correction, can solve problems such as low efficiency, achieve the effect of improving calculation efficiency and reducing the scale of matrix operations
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[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.
[0048] The present invention proposes a frequency-domain correction method for the finite element model based on the reduced basis, expressing the displacement of the finite element model of the bogie structure as a linear superposition of the modal comprehensive reduced basis or the modal mode shape reduced basis, and deriving the reduced coordinates The residual of the frequency response function below is related to the sensitivity matrix of the selected parameters to be corrected, and the sensitivity equation of the corresponding identification parameter increment is established according to the Newton-Gauss method, so that the correction process is carried out on the reduced coordinates, and the accuracy is ensured. The computational efficiency is significantly improved. At the same time, model correction is carried out under the theoretical framewor...
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