基于Poly MAX法的Z型折叠机翼的模态实验  

Modal Experiments of Z-Shaped Folding Wing Based on PolyMAX

作　　者：郭翔鹰[1] 张杨[1] 颜文瀚 王成刚 张伟[1] GUO Xiangying;ZHANG Yang;YAN Wenhan;WANG Chengang;ZHANG Wei(Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures,Beijing University of Technology Beijing,100124,China)

机构地区：[1]北京工业大学机械结构非线性振动与强度北京市重点实验室,北京100124

出　　处：《振动．测试与诊断》2020年第2期326-331,420,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(11202009,11772010)。

摘　　要：Z型折叠机翼在大气中飞行时会呈现不同的形态,其结构动力学特性变化明显,对其模态特性的分析是研究其结构特性的重要研究方法。首先,简要介绍模态分析技术以及PolyMAX法识别模态参数的基本原理;其次,结合试验模态分析和工作模态分析方法,对设计加工的Z型折叠翼模型在不同折叠形态下进行了模态实验;最后,对获得Z型折叠机翼实验模型的前5阶模态参数。结果表明,Z型折叠板在不同折叠角度下,各阶模态振动差异很大,其中折叠角度为90°时,结构更加稳定。Z-shaped folding wing presents multiple forms during a flight and the structural dynamical feature varies with its forms.So the research on the modal characteristics is important to investigate its structure.First,the modal analysis technology and the fundamentals of PolyMAX algorithm are reviewed.Then,modal experiments are conducted on the Z-shaped folding wing at different forms based on the experimental modal analysis(EMA)and operational modal analysis(OMA).Finally,the parameters of the first five orders are validated.The results show that folded angles have significant impact on the structure stability.Particularly,the structure is stablest when the folded angle is 90°.

关 键 词：PolyMAX 可变体飞行器 折叠机翼 模态特性 模态分析技术 模态参数 

分 类 号：O32[理学—一般力学与力学基础] TH113.1[理学—力学]