基于混合分层理论的粘弹层合圆柱壳的阻尼振动和层间应力研究  

DAMPING VIBRATION AND INTERLAMINAR STRESSES STUDY USING MIXED LAYERWISE THEORIES FOR VISCOELASTIC LAMINATED CYLINDRICAL SHELLS

作　　者：杨少红[1] 王安稳[1] 

机构地区：[1]海军工程大学理学院,武汉430033

出　　处：《工程力学》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)

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.

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 

分 类 号：O321[理学—一般力学与力学基础]