Abstract: In order to obtain the vibration characteristics of composite laminate structure, the composite laminate is taken as the research object. The kinetic properties of the structure were analyzed by finite element method. The influence of the main elastic modulus ratio, length to width ratio and layup mode on the natural frequency of the structure is obtained. The results show that the initial fourth natural frequencies of the structure increase with the increase of the main elastic modulus ratio and the length to width ratio. As the length to width ratio of the structure increases, the initial fourth natural frequencies of the structure increase with increasing amplitude. The first-order natural frequency and the second-order natural frequency change approximately linearly with an increase in the ratio of the principal elastic modulus. The initial fourth natural frequencies of the symmetric laminate structure, the antisymmetric laminate structure and the asymmetric laminate structure increase with the increase of the layer thickness, compared with the other two laminate methods, the initial fourth natural frequencies of the antisymmetric laminate structure is larger.

Key words: composite material, finite element, antisymmetric laminated plates, natural frequency