Hierarchical model updating strategy of complex assembled structures with uncorrelated dynamic modes
| Autor: | Lei Han, Yat Sze Choy, Rhea Patricia Liem, Hao-Tian Liu, Chengwei Fei |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
0209 industrial biotechnology
Computer science Mechanical Engineering Aerospace Engineering Parameterized complexity 02 engineering and technology 01 natural sciences Hierarchical database model Finite element method 010305 fluids & plasmas Consistency (database systems) 020901 industrial engineering & automation Complex geometry 0103 physical sciences Parametric model Minification Algorithm Test data |
| Zdroj: | Chinese Journal of Aeronautics. 35:281-296 |
| ISSN: | 1000-9361 |
| DOI: | 10.1016/j.cja.2021.03.023 |
| Popis: | In structural simulation and design, an accurate computational model directly determines the effectiveness of performance evaluation. To establish a high-fidelity dynamic model of a complex assembled structure, a Hierarchical Model Updating Strategy (HMUS) is developed for Finite Element (FE) model updating with regard to uncorrelated modes. The principle of HMUS is first elaborated by integrating hierarchical modeling concept, model updating technology with proper uncorrelated mode treatment, and parametric modeling. In the developed strategy, the correct correlated mode pairs amongst the uncorrelated modes are identified by an error minimization procedure. The proposed updating technique is validated by the dynamic FE model updating of a simple fixed–fixed beam. The proposed HMUS is then applied to the FE model updating of an aeroengine stator system (casings) to demonstrate its effectiveness. Our studies reveal that (A) parametric modeling technique is able to build an efficient equivalent model by simplifying complex structure in geometry while ensuring the consistency of mechanical characteristics; (B) the developed model updating technique efficiently processes the uncorrelated modes and precisely identifies correct Correlated Mode Pairs (CMPs) between FE model and experiment; (C) the proposed HMUS is accurate and efficient in the FE model updating of complex assembled structures such as aeroengine casings with large-scale model, complex geometry, high-nonlinearity and numerous parameters; (D) it is appropriate to update a complex structural FE model parameterized. The efforts of this study provide an efficient updating strategy for the dynamic model updating of complex assembled structures with experimental test data, which is promising to promote the precision and feasibility of simulation-based design optimization and performance evaluation of complex structures. |
| Databáze: | OpenAIRE |
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