玻璃钢/复合材料 ›› 2009, Vol. 209 ›› Issue (5): 10-13.

• 基础研究 • 上一篇    下一篇

含孔损伤复合材料层合板固有频率研究

  

  1. 中国民航大学航空工程学院,天津 300300
  • 出版日期:2009-09-28 发布日期:2009-05-25
  • 作者简介:卢翔(1969),男,讲师,博士,主要从事复合材料结构设计方面的研究。
  • 基金资助:

    中国民航大学横向项目(KK6214)

STUDY ON NATURAL FREQUENCY OF LAMINATES WITH CUTOUT

  • Online:2009-09-28 Published:2009-05-25

摘要:

建立了含圆形穿孔和方形穿孔损伤复合材料层合板的有限元计算模型。随着开孔损伤尺寸的变化,计算出含圆形穿孔或方形穿孔损伤复合材料层合板的各阶固有频率。拟合出开孔大小和固有频率之间的关系,得到了层合板固有频率随孔的尺寸和形状变化规律。结果表明,随着损伤程度增加,层合板固有频率都将减小;方孔损伤层合板固有频率减小的幅度和速度都比圆孔损伤层合板的大;小尺寸穿孔损伤对层合板固有频率的影响很小。

关键词: 固有频率, 孔损伤, 层合板, 有限元法

Abstract:

The existence of the cutout has a great effect on the structural mechanical performance. Based on MSC.Patran, a finite element model was developed to study the free vibration response of square composite laminates with oneedge simply supported and having an eccentrically circular or rectangular cutout. Along the size of cutouts were increasing, natural frequencies of composite laminates with circular or rectangular cutout were obtained by this finite element model. The variety laws of natural frequency along with shape and size was fitted. The results show that the natural frequencies of composite laminates with circular or rectangular cutout are reduced compared with the natural frequencies of composite laminates with no damage. The influence of rectangular cutout on frequency is more severe than circular cutout. The influence of litter cutout damage on natural frequency is not evidence.

Key words: natural frequency, cutout, laminates, FEA