开孔复合材料扁球壳的非线性动态响应

复合材料层合壳体在航空、航天、工程结构中得到广泛应用.由于许多结构是在非线性状态下工作的,因此,研究复合材料层合壳体的非线性特性,大挠度变形,非线性屈曲,非线性振动有着十分重要的意义.研究了开孔复合材料层合扁球壳的非线性动态响应问题.建立了对称层合圆柱正交异性开孔扁球壳考虑横向剪切和阻尼的非线性振动微分方程,分析了横向剪切、阻尼、强迫荷载对幅频特性曲线的影响.

Nonlinear dynamic response of symmetrically laminated cylindrically orthotropic truncated shallow shells

It is common knowledge anisotropic composites as structural members, particularly thin plate and shells, has increased considerably. This arises from the fact that, by taking advantage of its anisotroplc material properties and light weight with high strength. Therefore, there is already a considerable amount of research on nonlinear problems of plates and shells. But, the problems of nonlinear vibration of symmetrically laminated cylindrically orthotropic mmcated shallow shells including transverse shear and damping have been investigated by relatively few researchers because of the difficulties of nonlinear mathematical problems and more complicated structures. In this paper, the problem of nonlinear vibration of symmetrically laminated cyhndrically orthotropie mmcated shallow shells including transverse shear and damping has been studied. The period solutions of resonance are also obtained. Finally, the effects of transverse shear and damping on the characteristic curves of frequency and amphtude of vibration is discussed.