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

林敦祥; 倪荣根

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

林敦祥¹,
倪荣根²

1.
陕西机械学院;
2.
航空工业部六二一所

计量
- 文章访问数: 1743
- HTML全文浏览量: 77
- PDF下载量: 830
- 被引次数: 0
出版历程
- 收稿日期: 1983-05-27
- 刊出日期: 1986-02-15

The Finite Element Technique for Predicting the Natural Frequencies, Mode Shapes and Damping Values of Filamentary Composite Plates

Lin Dun-xiang¹,
Ni Rong-gen²

1.
Shanxi Institute of Mechanical Engineering, Xi'an;
2.
Beijing Institute of Aeronautical Materials, Beijing

摘要

摘要: 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.

Abstract: 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.

HTML全文

参考文献(15)

[1]	Asbton,J.E.and M.E.Waddoups,Analysis of anisotropic plates,J Composite Materials,3.(1969),148.
[2]	Ashton,J.E.and J.D.Anderson,The natural modes of vibration of boron-epoxy plates,Shock and Vibration Bulletin,39(1969),81.
[3]	Cawley,P.and R.D.Adams,The predicted and experimental natural modes of free-free CFRP plates,J.Composite Materials,12(1978),336.
[4]	Reddy,J.N.,Free vibration of antisymmetric,angle-ply laminated plates including transverse shear deformationt by finite element methed,J Sound and Vibration,66,4(1979),565
[5]	Hashin,Z.,Complex moduli of viscoelastic composite-2.Fibre reinforced materials,Int.J.of Solids and Structures,6(1970),797.
[6]	Bert,C.W.,Vibration of composite structure,Recent Advances in Structural Dynamics,Int.Conf University of Southampton,(1980),7-11.
[7]	Adams,R,D.and D.G.C.Bacon,Effect of orientation and laminated geometry on the dynamic properties of CFRP,J.Composite Materials,7(1973),402.
[8]	Ioannides,E.and P.Grootenhuis,Finite element analysis of the harmonic response of damped three-layer plates,J.Sound and Vibration,67,2(1979),203.
[9]	Lin Dun-xiang(林敦祥),Ni Rong-gen(倪荣根)and R.D.Adams,Prediction and measurement of the vibrational damping parameters of carbon and glass fibre-reinforced plastics plates,J.Composite Materials,18,(March.1984),132.
[10]	Ni Rong-gen(倪荣根),Lin Dun-xiang(林敦祥)and R.D.Adams,The dynamic properties of carbon-glass fibre sandwich hybrid laminated composites:Theoretical,experimental and economic consideration,Composites,15,4(Oct.1984),297.
[11]	Yang,P.C.,C.H.Norris and Y.Stavsky,Elastic wave propagation in heterogenous plates,Int.J.Solids and Structures,2(1966),665.
[12]	Ashton,J.E.and J.M.Whitney,Theory of Laminated Plates,Technomic Publishing Co.,Inc.(1970).
[13]	Cawley,P.and R.D.Adams,The location of defects in structures from measurements of natural frequencies,J.Strain Analysis,14,2(1979),49.
[14]	Ni Rong-gen(倪荣根)and R.D.Adams,A rational method for obtaining the dynamic properties of laminae for predicting the stiffness and damping of laminated plates and beams,Composites,15,3(July 1984),193.
[15]	Lin Dun-giang(林敦祥)and R.D.Adams,Determination of damping characteristics of structures by transient testing using Zoom-FFT,J.of Physics,E,18,2(1985),161.