利用代理模型的客机总体参数敏感性分析

发布时间：2019-06-04 05:46

【摘要】：为了减少客机总体参数敏感性分析的计算量并实现分析结果的实时显示,研究一种客机总体综合分析模型的代理模型建模方法并用于快速敏感性分析。首先,明确设计变量和目标量并选取合适的多维设计空间,然后,用最优拉丁超立方设计方法在该设计空间选取一定数量样本点,用客机总体综合分析模型对样本点分别计算分析,得到一系列关心的目标量;随后,用二阶多项式作为响应面构建近似模型;最后,基于该近似模型快速生成多种图形反映总体参数对目标量的影响趋势。以某型宽体客机总体参数敏感性分析算例表明,当样本点数目为设计参数的15倍左右时,代理模型的精度满足要求;通过趋势图、曲面图、Pareto图可实时显示单、多参数对客机性能指标等目标量的影响关系。
[Abstract]:In order to reduce the computational complexity of the overall parameter sensitivity analysis of passenger aircraft and realize the real-time display of the analysis results, a proxy model modeling method of the overall comprehensive analysis model of passenger aircraft is studied and applied to the rapid sensitivity analysis. First, the design variables and target quantities are defined and the appropriate multidimensional design space is selected. Then, a certain number of sample points are selected in the design space by using the optimal Latin hypercubic design method. The overall comprehensive analysis model of passenger aircraft is used to calculate and analyze the sample points respectively, and a series of concerned target quantities are obtained. Then, the second-order polynomial is used as the response surface to construct the approximate model. Finally, based on the approximate model, a variety of graphics are quickly generated to reflect the influence trend of the overall parameters on the target quantity. The sensitivity analysis of the overall parameters of a wide-body passenger plane shows that when the number of sample points is about 15 times of the design parameters, the accuracy of the agent model meets the requirements. Through trend diagram, surface diagram and Pareto diagram, the influence of single and multi-parameters on the performance index of passenger aircraft can be displayed in real time.
【作者单位】：南京航空航天大学飞行器先进设计技术国防重点学科实验室;中国商用飞机有限责任公司上海飞机设计研究院;
【基金】：南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20150108)
【分类号】：V221

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