考虑多维相关性的飞行器结构载荷不确定性分析Uncertainty analysis of aircraft structures load considering multi-dimensional correlation
邱宇,邱志平
摘要(Abstract):
飞行器结构载荷预测在其总体设计中具有重要地位。建立了一种考虑多维不确定性参数相关性的飞行器结构载荷不确定性分析方法。通过有限元计算并基于切比雪夫多项式建立了结构载荷响应的一维和二维近似函数。利用高维模型表示方法建立了关于所有输入不确定性变量的近似代理模型。采用全局优化算法求得代理模型响应的最值,从而获得了结构载荷响应的区间上下界。与蒙特卡洛方法结果进行对比,证实了所提方法的有效性和准确性。
关键词(KeyWords): 飞行器结构载荷;区间不确定性;多维相关性;高维模型表示方法;代理模型方法;优化算法
基金项目(Foundation): 国家自然科学基金(12132001;52192632)
作者(Author): 邱宇,邱志平
DOI: 10.16338/j.issn.2097-0714.20230010
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