机械科学与技术2017，Vol.36Issue(2)：323-328,6.DOI:10.13433/j.cnki.1003-8728.2017.0228
考虑结构参数不确定性的概率颤振分析
Probabilistic Flutter Analysis Considering Uncertainties of Structural Parameters
闫国良 1杨光猛 2万小朋2
作者信息
- 1. 中国商用飞机有限责任公司上海飞机设计研究院,上海201210
- 2. 西北工业大学航空学院,西安710072
- 折叠
摘要
Abstract
A uniform straight wing was selected to develop an uncertainty quantification and parameter sensitivity analysis method based on the probabilistic flutter.Firstly,the structural equations of motions were presented by applying the extended Hamilton's principle,and a certain flutter velocity was obtained by analyzing the eigenvalue solution.The probabilistic distribution of flutter failure was estimated by using Monte Carlo simulation considering random uncertain variables to satisfy normal distribution.Then line sampling technique was developed to select the important parameters by using the sensitivity analysis under 0.1％ probabilistic flutter failure.Finally,the results indicated that the decrease in the mean and the variability of the length of span as well as chord,or the increase in the mean of bending stiffness and torsional stiffness could reduce the probability of flutter failure.关键词
颤振/不确定性分析/蒙特卡罗法/线抽样法/灵敏度分析Key words
flutter/uncertainty analysis/Monte Carlo methods/line sampling technique/sensitivity analysis分类
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闫国良,杨光猛,万小朋..考虑结构参数不确定性的概率颤振分析[J].机械科学与技术,2017,36(2):323-328,6.
