Structure finite element model correcting method based on multi-element uncertainty
A technology of uncertainty and model correction, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of lack of synchronization of correction results and cumbersome calculation process.
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[0065] Below in conjunction with accompanying drawing and embodiment the present invention is described in detail
[0066] by figure 2 The dynamic analysis of the shown finite element model of the aircraft structure is used as an example to illustrate the present invention. The aircraft model is mainly composed of aluminum beams with a rectangular cross section, including the fuselage, wings, vertical tail, horizontal tail, and winglets on both sides.
[0067] See figure 1 , the present invention is based on a multivariate uncertainty structural finite element model correction method, the specific steps of the method are as follows:
[0068] Step 1: In the Nastran finite element software, the aircraft structure is simplified, and an initial parametric finite element model (that is, the model before correction) is established. The geometric and material parameters of the fuselage, wings and other parts in the initial finite element model are relatively accurate, but the mod...
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