| 考虑不确定性因素的有限元屈曲模型验证 |
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| 引用本文： | 聂小华,吴存利.考虑不确定性因素的有限元屈曲模型验证[J].力学与实践,2017,39(5):460-467. |
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| 作者姓名： | 聂小华 吴存利 |
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| 作者单位： | 中国飞机强度研究所, 西安 710065 |
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| 摘 要： | 研究了考虑不确定性因素的有限元屈曲模型验证和确认方法,提出了不确定参数选择的相关性和敏度分析方法以及基于面积度量的模型评估方法.针对化铣整体壁板,开展了有限元屈曲模型验证研究,首先利用8件试验件,获得了壁板屈曲载荷的试验值,然后依据试验加载情况,建立了考虑试验台的壁板有限元模型,最后利用面积度量方法对有限元模型进行了验证和确认.本文的模型验证和确认方法可为其他工程结构开展类似的工作提供借鉴.
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| 关 键 词： | 整体壁板 建模 模型验证 不确定性 正态分布 面积度量 |
| 收稿时间： | 2017-02-15 |
VALIDATION AND CONFIRMATION OF STATIC FINITE ELEMENT MODEL BY CONSIDERING UNCERTAINTIES |
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| NIE Xiaohua,WU Cunli.VALIDATION AND CONFIRMATION OF STATIC FINITE ELEMENT MODEL BY CONSIDERING UNCERTAINTIES[J].Mechanics and Engineering,2017,39(5):460-467. |
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| Authors: | NIE Xiaohua WU Cunli |
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| Institution: | Aircraft Strength Research Institute of China, Xi'an 710065, China |
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| Abstract: | The finite element static models are validated by considering uncertain factors. The concepts of the correlation and the sensitivity in selecting uncertain parameters are proposed, as well as a general area metric, to validate finite element models. The model of an integrated stiffened panel is used to demonstrate the validation approach. The physical tests of the integrated stiffened panels are carried out to obtain the buckling loads. The finite element model is built with consideration of the stiffened panel and the test-bed. The reliability of the model is assessed against the experimental data by using the area metric. The validation approach in this paper can be used for similar engineering cases. |
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| Keywords: | integrated stiffened panels modeling model validation uncertainty normal distribution area metric |
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