以形状记忆合金纤维增强复合材料梁为研究对象 ,应用有限元法对其低速冲击响应进行了分析 .采用Newmark直接积分法求解有限元动力方程 ,并考虑了形状记忆合金对刚度矩阵的影响 ;同时 ,利用Hertzian接触定律确定冲击接触力 ;分析结果表明形状记忆合金能有效地改善复合材料梁的低速冲击响应性能 ,它的最大位移与最大压应力都有明显减少 . Taking shape memory alloy fiber-reinforced composite beam as the research object, the low-speed impact response of the composite beam was analyzed by finite element method. Newmark direct integration method was used to solve the dynamic equation of finite element, and the effect of shape memory alloy on the stiffness matrix was considered. Simultaneously , The contact force was determined by Hertzian contact law. The results show that the shape memory alloy can effectively improve the low-speed impact response of the composite beam, and its maximum displacement and maximum compressive stress are obviously reduced.