| 大展弦比机翼几何非线性气动弹性响应分析 |
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| 引用本文： | 许成,员海玮,郁步军,蔡文华,梁书亭,张继文. 大展弦比机翼几何非线性气动弹性响应分析[J]. 盐城工学院学报(自然科学版), 2014, 27(1): 46-51 |
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| 作者姓名： | 许成 员海玮 郁步军 蔡文华 梁书亭 张继文 |
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| 作者单位： | 南京航空航天大学航空宇航学院，江苏南京，210016;南京航空航天大学航空宇航学院，江苏南京，210016;盐城工学院土木学院，江苏盐城，224051;盐城工学院土木学院，江苏盐城224051；东南大学土木工程学院，江苏南京210096;东南大学土木工程学院，江苏南京，210096;东南大学土木工程学院，江苏南京，210096 |
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| 摘 要： | 采用UL格式,建立一种适用于结构大变形问题的高精度非线性动响应求解器;通过有理函数拟合,将频域气动力转化为时域下的气动力格式,以紧耦合的方式建立起结构-气动耦合关系。以某大展弦比机翼为例,进行气动弹性响应计算并做颤振分析,可准确预测临界颤振速度;几何非线性对气动弹性响应特性具有显著的影响。
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| 关 键 词： | 几何非线性 大展弦比机翼 紧耦合 有理函数拟合 气动弹性响应 极限环 |
Analysis of Geometric Nonlinear Aeroelastic Responses of High Aspect Ratio |
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| XU Cheng,YUN Haiwei,YU Bujun,CAI Wenhu,LIANG Shuting,ZHANG Jiwen. Analysis of Geometric Nonlinear Aeroelastic Responses of High Aspect Ratio[J]. Journal of Yancheng Institute of Technology(Natural Science Edition), 2014, 27(1): 46-51 |
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| Authors: | XU Cheng YUN Haiwei YU Bujun CAI Wenhu LIANG Shuting ZHANG Jiwen |
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| Affiliation: | College of Aerospace Engineering of NUAA;;School of Civil Engineering Yancheng Institute of Technology;School of Civil Engineering,Southeast University; |
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| Abstract: | Based on updated Lagrange(UL) scheme,a structural solver with high precision for computation of nonlinear dynamic response of the structure with large deflation was established;In order to express aerodynamic forces in time domain,the aerodynamic matrices are approximated as rational functions via fitting method.Structure- aerodynamic coupling relationship is established in a tight coupling manner.The nonlinear aeroelastic responses of a high aspect ratio wing was calculated by the method presented in this paper,via flutter analysis,it is showed that the method developed in this paper is able to predict accurate critical flutter speed;the geometric nonlinearity makes a significant impact on the aeroelastic responses. |
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| Keywords: | geometric nonlinearity high aspect ratio wing tight coupling rational function approximation nonlinear aeroelastic response limit cycle oscillation |
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