| FU Peng-zhe 1 ， ZHAO Di-wen 2 ， LIU Yu 2.Simplified Model Updating of Bolted Connection Structure of Aeroengine Casing[J].航空发动机,2024,50(3):98-102 |
| Simplified Model Updating of Bolted Connection Structure of Aeroengine Casing |
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| Key Words:bolted connection structure finite element modeling modal testing model updating casing aeroengine |
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| Abstract:In order to improve the efficiency of dynamic model updating of bolted connection structures of aeroengine casing， a
simplified model updating technique based on solid mode shape was proposed based on modal assurance criterion （MAC）， and the finite
element parameter models of typical bolted connection structures of aeroengine casings were updated by this technique. The modal informa?
tion of the actual casing is obtained through modal testing， and compared with the modes of the finite element solid model. The modal
information of the solid model is used to screen the updating parameters， and the simplified casing dynamic model is updated by the
parametric response surface optimization method. The results show that the simplified model updating technology of dynamic parameters
based on solid model vibration modes can avoid multiple calls to the model and improve the updating efficiency of the simplified model.
The accuracy of the updated simplified model of a typical bolted connection structure is significantly improved by about 11%. After further
improvement， the updating technology can be used for dynamic analysis and fault analysis of aeroengines. |
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