预测纤维增强复合材料层压板固有频率振型及模态阻尼的有限元算法

本文提供了预测纤维增强复合材料层压板固有频率、振型及模态阻尼的理论计算方法,此方法是综合了有限元法和阻尼单元模型,并考虑了横向剪应变和转动惯量的影响,本文给出了对称铺层石墨纤维及玻璃纤维复合材料层压板的理论计算结果,并给出实验数据进行对比.本文还提出一种预测复合材料层压板固有频率和阻尼的简易方法.     

THE FINITE ELEMENT TECHNIQUE FOR PREDICTING THE NATURAL FREQUENCIES,MODE SHAPES AND DAMPING VALUES OF FILAMENTARY COMPOSITE PLATES

This article presents the numerical method for predicting the natural frequencies,mode shapes and damping values of filamentary composite plates.This method is based onfinite element technique,using damped element and allowing transverse shear deformation.For the example of this technique,the theoretical results comparing with experimentalvalues of carbon and glass fibre reinforced plastics plates(mid-plane symmetric)areprovided.The dynamic properties of these laminates are discussed.Finally,a simplegraphic technique to estimate the natural frequencies and damping values is suggested.     

The finite element technique for predicting the natural frequencies,mode shapes and damping values of filamentary composite plates

This article presents the numerical method for predicting the natural frequencies, mode shapes and damping values of filamentary composite plates. This method is based on finite element technique, using damped element and allowing transverse shear deformation. For the example of this technique, the theoretical results comparing with experimental values of carbon fibre and glass fibre reinforced plastics plates (mid-plane symmetric) are provided. The dynamic properties of these laminates are discussed. Finally, a simple graphic technique to estimate the natural frequencies and damping values is suggested.     

石墨/玻璃纤维夹层结构混合复合材料层压板的振动分析

本文应用考虑了横向剪切变形的有限元法及阻尼单元模型对石墨/玻璃纤维夹层结构混合复合材料层压板进行振动分析,求出其固有频率、振型和阻尼值。讨论了理论计算和实验的结果。本文还讨论了改变石墨纤维在此类板中的含量对有效弯曲模量及振动模态参数(固有频率、振型及阻尼值)的影响。