ANALYTICAL MODELS, NUMERICAL SOLUTIONS AND ADVANCES IN THE STUDY OF PANEL FLUTTER
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摘要:研究壁板颤振问题需要计及大挠度变形下结构的几何非线性效应,不仅涉及气动弹性稳定性,而且关心结构的非线性颤振响应.该文回顾了飞行器壁板颤振问题的国内外研究情况,评述了在壁板颤振研究中采用的分析模型、数值求解方法以及在理论分析和试验方面的研究成果,并提出了今后壁板颤振问题的4个研究方向.Abstract:Panel flutter is anaeroelastic phenomenon occurring on the aircraft skin. Acting aslocal structure components on the surface of aircraft, only onesurface of panel is subjected to airflow. Because of the specialconfiguration of panel structure, the bending deflection of panelis strongly confined by its geometrical boundaries, and panelflutter usually exhibits nonlinear behavior with limited amplitudewhich has the same order as the panel thickness. Generally, thepanel flutter will cause fatigue damage rather than rapiddestructive failure of the structure. Therefore, geometricalnonlinearity effect stemming from large deflection should beconsidered in the study of panel flutter problem. For panelflutter problem of hypersonic aircraft, thermal stress induced byaerodynamic heating effect can reduce the bending load carryingcapacity of panel, thus leads to thermal buckling, thermal flutterand more complex dynamic behaviors. The study on panel flutter,especially on panel thermal flutter has both the academic researchand engineering application significance. Panel thermal flutteranalysis considering structural nonlinearity is a widely concernedresearch topic in recent years. In this paper, a historic reviewof panel flutter problems is presented, then the analyticalmodels, numerical solutions of panel flutter are summarized, andtheoretical and experimental results of panel flutter are alsoelucidated. Finally four topics are suggested for future research.
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