摘要
用一阶剪切变形理论获得复合材料层合圆柱壳的运动微分方程,再应用波传播方法分析其自由振动的频率。通过比较,本文的计算方法所得的结果与文献[5]比较吻合。本文还研究了几种壳体参数对圆柱壳自由振动频率的影响。h/R的比值对频率影响当周向模态n=3时较大,n=2时次之,n=1时较小。E1/E2的比值越大,频率越大。辅层的角度在n较小时对频率的影响不大,在n比较大时,角度越小影响越大。
Fquations of motion for the laminated composite sylindrical shells are established using first-order shear deformation theory,then the wave propagation approach is extended to analyse the natural frequencies of it.Results obtained using the mothod have been evaluated against those available in the literature and good agreement has been found.With the present method the effects of shell parameters on the frequencies are investigated.The frequencies of the shells increaseds with increase of h/R ratio,and the frequency of n=3 is larger than that of n=1 and n=2 between them..The frequencies of the shells increase with increase of E1/E2 ration also.The effects of lamination angle can be seen to be more significant at large circumferential mode n than at small circumferential modes
出处
《噪声与振动控制》
CSCD
2003年第6期1-4,8,共5页
Noise and Vibration Control
关键词
复合材料
圆柱壳
微分方程
波传播法
自由振动频率
Vibration and wave
Iaminated composite cylindrical shells
shear deformation
wave propagation
