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Vibration characteristics and supersonic flutter of cylindrical composite panels with large thermoelastic deflections

机译：具有大热弹性挠度的圆柱复合板的振动特性和超音速颤振

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摘要

Vibration characteristics and supersonic flutter of cylindrical laminated panels subjected to thermal loads were investigated by using geometrically nonlinear finite elements based on a layerwise theory. Present nonlinear layerwise theory can describe zig-zag displacements and a thermal field providing a more realistic description of the vibration characteristics and supersonic flutter of cylindrical composite panels. Krumhaar's supersonic piston theory was applied to model the supersonic aerodynamic loads. The present results show that vibration and aeroelastic characteristics of cylindrical composite panels are very sensitive to structural parameters such as radius, shallowness angles and lamination type. As the radius decreases and the shallowness angles increases, supersonic flutter of the cylindrical composite panels can occur in the very high circumferential modes. Also, the critical aerodynamic pressure of cylindrical composite panels with large thermoelastic deflections can be dramatically reduced due to the reduction of the frequency intervals between two flutter modes.
机译：利用基于层理的几何非线性有限元，研究了圆柱层压板在热载荷作用下的振动特性和超音速颤振。当前的非线性分层理论可以描述锯齿形位移和热场，从而提供了对圆柱形复合板的振动特性和超音速颤动的更实际描述。克鲁姆哈尔（Krumhaar）的超音速活塞理论被用于对超音速空气动力载荷进行建模。目前的结果表明，圆柱形复合板的振动和气动弹性特征对结构参数（例如半径，浅角和层压类型）非常敏感。随着半径的减小和浅角的增加，圆柱形复合板的超音速颤动会在非常高的圆周模式下发生。而且，由于减小了两个颤振模式之间的频率间隔，具有大的热弹性挠度的圆柱形复合板的临界空气动力压力可以大大降低。

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  • 来源
    《Composite Structures》 |2009年第2期|208-216|共9页
  • 作者

    Il-Kwon Oh; Dong-Hyun Kim;

  • 作者单位

    School of Mechanical Systems Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwang-ju 500-757, Republic of Korea;

    School of Mechanical and Aeroepace Engineering, Research Center for Aircraft Parts Technology, CyeongSang National University, Cyeongnam,Jinju City 660-701, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    vibration; flutter; cylindrical composite; thermoelasticity;

    机译：振动;扑;圆柱复合材料热弹性;

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