摘要
静气动弹性研究中关于结构的分析通常采用柔度法和模态法。相比技术成熟、计算量大的柔度法,模态法具有阶次低、求解快和便于试验验证的优点。但其作为近似的分析方法,在工程应用中需要一定的经验,尚缺乏模态选取的准则,该研究的目的是为模态法的工程应用提供模态选取的定量评价标准。针对某典型飞行器进行升降舵效率、副翼效率及气动导数弹性修正等分析,提出模态影响系数的概念来评估模态的选取对这些气动弹性分析的影响。结果表明,模态影响系数指标合理,能够反映模态选取对静气动弹性特性的影响,可以作为模态法中模态选取的定量评价指标。
The flexibility method and modal approach are usually used in structural analysis in the static aeroelastic research.Compared to the flexibility method which is mature but brings higher computational cost for the solution,the modal approach has the advantage of significant reduction in the dimension of the problem,high efficiency and convenient for verification.However,there are no principles for the selection of modes and one must have enough engineering experience to fully utilize the modal approach in practice.To provide modal approach with its own quantitative criteria in practice,this paper first proposes the idea of modal influence coefficient to evaluate the effect of modal selection on modal approach of aeroelastic analysis.In order to validate the rationality and validity of the modal influence coefficient,the paper carrys out control efficiency and aeroelastic correction analysis for a typical aircraft.The results show that the modal influence coefficient can accurately evaluate the effect of modal selection on static aeroelastic analysis,thus providing some helpful reference in practice.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2015年第4期1128-1134,共7页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(11172025)~~
关键词
气动弹性
模态法
模态影响系数
弹性修正
操纵效率
aeroelasticity
modal approach
modal influence coefficient
aeroelastic correction
control efficiency
作者简介
杜子亮男，博士研究生。主要研究方向：气动弹性设计。Tel：010-82313376E—mail：duziliang2008@gmail．com
万志强男，博士，副教授，博士生导师。主要研究方向：气动弹性设计、飞机总体设计。Tel：010-82318723E-mail：wzq@buaa．edu．cn
杨超男，博士，教授，博士生导师。主要研究方向：气动弹性设计、飞行力学、飞机总体设计。Tel：010—82317528E—mail：yangchao@buaa．edu．cn
