Based on the Love theory, the internal forces and moments of laminated composite cylindrical shells are obtained from the relationship of infinitesimal stress-strain, and thereby the kinematic differential equation is derived. The characteristics of vibrationa power flow in a laminated composite cylindric shell were studied in the present paper. The vibration power flow from exciting force traveling along the shell was analyzed. It was concluded that all kinds of power flow transformed with each other during their traveling period, and ultimately tended towards a certain value. The vibration power flow carried by different internal forces was given to prove the characteristics of wave propagation while taking energy into consideration. The ratio of different kinds of waves can be determined quantitively according to the proportion of the power flow from different internal forces.%基于Love壳体理论,根据壳体微元应力、应变关系推得壳体中的各内力和力矩,得到了复合材料层合圆柱壳的运动微分方程.对复合材料层合圆柱壳中振动功率流特性进行了研究,在不同周向模态和频率下,对外载荷输入壳体的功率流及其沿壳体的传播情况进行了分析.分析表明,各内力功率流沿壳体传播时相互转化,最后趋于确定值.结合各内力传播的功率流,从能量角度考察了波的传播特点,通过各内力功率流的比例来定量的确定壳体中不同波传播的成份.
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