摘要
采用悬臂梁自由衰减振动的实验方法研究了碳纤维三维四向编织复合材料T型梁的模态性能,分析了纤维体积分数对其固有频率和阻尼的影响。将实验得到的固有频率结果与有限元得到的固有频率结果作了对比。结果表明:三维四向编织复合材料T型梁的模态性能与激振点位置无关。且其固有频率随纤维体积分数的增大而提高,阻尼性能随纤维体积分数的增大而降低。通过阵型可以准确判断T型梁固有频率的阶数。实验结果与计算结果相一致。
The modal properties of carbon fiber three-dimension and four-direction braided composite T-beams with different fiber volume fractions were studied by the free vibration method of cantilever beams. The effect of fiber volume fraction on natural frequency and damping was analyzed. The measured and finite element calculated results of natural frequency were compared. The results show that the modal properties of T-beams have nothing to do with the position of excitation point. The natural frequency of the composite T-beams increases and damping properties of the composite T-beams decrease with the increasing of fiber volume fraction. The order of the natural frequency of T-beam could be estimated accurately by the mode shape. The measured results are in agreement with the calculated results.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2015年第9期80-86,共7页
Journal of Materials Engineering
基金
天津市科技计划项目(11ZCKFSF00500
10SYSYJC27800)
关键词
三维四向编织
复合材料T型梁
模态分析
three-dimension and four-direction braiding
composite T-beam
modal analysis
作者简介
通讯作者：李嘉禄（1947-），男，教授，主要从事纺织复合材料结构及性能的研究，联系地址：天津市西青区宾水西道399号天津工业大学复合材料研究所（300387），E-mail：lijialu@tjpu．edu．cn
