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| Model Updating of Spacecraft Structure Based on Two-level Approximate Function |
| Received:August 22, 2018 Revised:November 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.11.008 |
| KeyWord:model updating frequency response sensitivity analysis approximate calculation multiple optimization |
| Author | Institution |
| LI Jian-hong-yu |
1. Science and Technology on Reliability and Environmental Engineering Laboratory, Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| PANG He-wei |
2. China Academy of Space Technology, Beijing , China |
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| Abstract: |
| Objective To improve the computational efficiency of model updating with two-level approximation method based on large-scale degrees of freedom and the complexity of the spacecraft structure. Methods The first-level approximate calculation formula for frequency response and its sensitivity was derived with Ritz space based on eigenvectors. The dynamic stiffness matrix after structural parameter changes was calculated by approximation function. The errors caused by approximate calculation were eliminated by multiple optimization. Results The method improved the computational efficiency of model updating by two numerical examples. Conclusion The method is suitable for model updating of spacecraft structure. |
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