玻璃钢/复合材料 ›› 2009, Vol. 209 ›› Issue (1): 15-18.

• 基础研究 • 上一篇    下一篇

含孔损伤平面编织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:2009-01-28 发布日期:2009-01-25
  • 作者简介:李顶河(1983),男,硕士研究生,主要研究方向为复合材料结构设计。
  • 基金资助:

    中国民航大学横向项目(KK6214)

STUDY ON NATURAL FREQUENCY OF PLAIN WOVEN FABRIC LAMINATE WITH CUTOUT

  • Online:2009-01-28 Published:2009-01-25

摘要:

本文对一端固支含圆形孔损伤平面编织层合板的固有动力特性进行了试验研究。基于MSC.Patran 建立了含圆形孔和椭圆孔损伤平面编织层合板的有限元模型,研究了圆孔损伤和椭圆孔损伤的损伤尺寸对一端固支纤维双向层合板固有频率的影响规律。试验结果表明,有限元方法得到的含圆孔损伤层合板固有频率与试验值吻合较好;圆形穿孔和长轴平行于试件长度方向椭圆形穿孔损伤对平面编织层合板各阶固有频率的影响规律相同;在椭圆穿孔损伤尺寸小于一定值或偏心率较小时,可用圆孔来估算椭圆形穿孔损伤和结构设计开孔对结构固有频率的影响。为开口复合材料结构件的设计以及含孔损伤复合材料结构件的维修设计提供依据。

关键词: 固有频率, 含孔损伤, 平面编织, 有限元分析

Abstract:

The existence of the cutout has a great effect on the structural mechanical performance. Dynamic mechanical characteristics of inplane woven composite laminates with one edge simply supported are studied by means of the experimental in this paper. Based on MSC.Patran, a finite element model is developed to study the free vibration response of square inplane woven composite laminates having an eccentrically. An attempt is made to gain a complete understanding of the effect of a circular or elliptical cutout on natural frequencies of the laminate. The results show that natural frequencies gain from means of experimental tallies with finite element model. The effect of circular cutout on natural frequencies is equivalent approximatively to elliptical cutout whose long axis parallel specimens length in whole cutout size range. When the elliptical cutout size or eccentricity ratio is under a val

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