多孔功能梯度压电纳米壳中波传播特性OA北大核心CSTPCD

The waves propagation characteristics in porous functionally graded piezoelectric nanoshells were in-vestigated based on the nonlocal strain gradient theory.The governing equations were developed under Hamil-ton's principle and the 1st-order shear theory.The scale-dependent characteristic equations were obtained through combination of the nonlocal strain gradient theory and the harmonic solutions.The effects of the scale parameter,the wave number,the gradient index,the thickness,the porosity and the voltage on the wave prop-agation characteristics were discussed numerically.The results show that,the influences of the nonlocal param-eter and the strain gradient parameter on the wave propagation frequency are closely related to the wave num-ber,and the larger the wave number is in a certain range,the greater the influence of scale parameters on the frequency will be.In addition,the porosity and the gradient index have a coupling effect on the frequency.