法向应力和法向应变对复合材料层板自由振动基础频率的影响

EFFECTS OF NORMAL STRESS AND NORMAL STRAIN ON THE FUNDAMENTAL FREQUENCIES OF FREE VIBRATIONS OF COMPOSITE LAMINATED PLATES

一种包含法向应力，法向应变和横向剪切影响的复合材料层板自由振动的新位移模式在本文中提出。通过应用层板自由振动的Ｒａｙｌｅｉｇｈ－Ｒｉｔｚ分析，比较了在简支边界条件下复合材料层板自由振动的ＹＮＳ理论解［１］和本文新位移模式解，从而得出在简支边界条件下法向应力和法向应变对复合材料层板自由振动基础频率的影响。

A new displacement model of free vibrations,including effects of normal stress,normal strain and transverse shear deformation,is developed in this paper,The new model solutions are compared with the YNS theory solutions using Rayleigh-Ritz method for free vibrations,and the effects of transverse normal stress and normal strain on the fundamental frequencies of free vibrations of composite laminated plates with simply-supported edges are obtained.