由于复合材料层合板的横向剪切模量较低，因此基于克希霍夫理论而计算的层合板特征值及其灵敏度与实际情况相差较大。本文采用层合板的一阶剪切变形理论，将纤维铺设角、材料参数和从层合板的中面到第Ｋ层板上表面的距离ＺＫ视为设计变量，研究了对称层合板特征值的灵敏度计算问题。 Due to the low transverse shear modulus of composite laminates, the calculated values ​​of eigenvalues ​​and their sensitivities based on Kirchhoff’s theory are quite different from the actual ones. In this paper, the first-order shear deformation theory of laminates is used to design the fiber lay angle, material parameters and the distance ZK from the middle of the laminate to the upper surface of the Kth laminates. The sensitivity of the characteristic value of the symmetrical laminate Calculate the problem.