中国民航大学学报

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基于动态子结构法的复合材料加筋板的振动特性

钱若力,王瑞鹏,李顶河   

  1. (中国民航大学航空工程学院,天津300300)
  • 收稿日期:2016-03-01 修回日期:2016-03-31 出版日期:2016-12-26 发布日期:2016-12-28
  • 作者简介:钱若力(1959—),男,天津人,副教授,博士,研究方向为复合材料结构分析.
  • 基金资助:

    国家自然科学基金青年基金(11502286);中国民航大学“蓝天青年学者”培养计划(205003110307);中国民航大学科研基金项目(2011kyE03)

Free vibration analysis of stiffened composite plate structure based on dynamic substructure method

QIAN Ruoli, WANG Ruipeng, LI Dinghe   

  1. (College of Aeronautical Engineering, CAUC, Tianjin 300300, China)
  • Received:2016-03-01 Revised:2016-03-31 Online:2016-12-26 Published:2016-12-28

摘要:

采用动态子结构法中的固定模态综合法研究复合材料加筋板的振动特性。首先,基于逐层/实体元方法建立板和加强筋两个子结构的控制方程。然后,在固定界面下建立子结构的模态空间并将其控制方程转换成模态空间下的控制方程。最后,根据板和加强筋相互连接区域的内力平衡和位移协调条件,建立固定界面模态下的总体控制方程。通过数值算例将本文方法与MSC 软件分析结果进行对比,从而论证该方法的正确性。此外,还对复合材料加筋板进行自由振动分析,研究结果对于分析加筋板结构具有一定的指导意义。

 

关键词: 动态子结构法, 固定界面模态综合法, 加筋板, 自由振动, 复合材料

Abstract:

Fixed-interface modal synthesistechnique based on dynamic substructure method is used to analyze free vibration performance of stiffened plate structure. First of all, governing equations of plate and stiffeners are established based on layerwise/solid element. And then, substructures‘modal space is established and governing equations are converted into equations under modal space. Finally, basing on governing equations of plate and stiffeners, the finial governing equation of stiffened plate is assembled by using compatibility conditions, which is used to ensure the compatibility of displacements at the interface between plate and stiffeners. Numercal results of the proposed method are compared with those obtained from finite element software MSC, and good agreements are
achieved. In addition, a series of numerical analyses are conducted to further explore free vibration analysis of composite stiffened plate structure. Conclusion derived from this study is expected to be useful for stiffened plate structure aralysis.

Key words: dynamic substructure method, fixed-interface modal synthesis technique, stiffened plate, free vibration, composite material