摘要
应用混合分层理论,并在壳厚方向采用位移和应力插值函数推导出粘弹层合圆柱壳的动力学方程。计算了两层粘弹层合圆柱壳的振动频率和结构损耗因子,与Okazaki A的结果吻合良好。针对不同模量和厚度的粘弹性材料,计算出层合圆柱壳的层间横向应力的幅值。结果表明:过大的层间法向正应力是导致自由阻尼层合壳脱层破坏的主要因素,采用环向加强的粘弹性材料将有效地降低层间法向正应力的幅值。
By use of the mixed layerwise theories and the interpolation functions of displacements and transverse stress, the dynamic equations of viscoelastic laminated cylindrical shells were derived. The predicted vibration frequency and loss factor show the good agreement with the Okazaki A＇ experimental results for the two-layer cylindrical shells. The amplitudes of interlaminar transverse stresses were computed for different Young＇s modulus and thickness of viscoelastic layer. The results show that very high intedaminar transverse normal stresses are the main factor resulting in delamination for the free-damped laminated shells and that using a circular-reinforced viscoelastic layer will effectively decrease the amplitude of transverse normal stress.
出处
《工程力学》
EI
CSCD
北大核心
2008年第3期38-42,共5页
Engineering Mechanics
基金
国家自然科学基金项目(10572150)
关键词
层合圆柱壳
混合分层理论
阻尼振动
层间应力
粘弹性材料
laminated cylindrical shells
mixed layerwise theories
damping vibration
interlaminar stresses
viscoelastic layer
