利用ABAQUS 模拟2024铝制圆杆经激光冲击后的动态响应，研究了激光诱导的应力波沿纵向和横向的衰减特性，讨论了杆径对应力波峰值随传播距离衰减的影响，对比分析了杆径对残余应力场的影响。结果表明: 强激光诱导的应力波峰值在圆杆中沿纵向和横向均随传播距离的增大而逐渐减小，同时波形出现“弥散”现象。应力波峰值的衰减速度呈先快后慢的趋势。随着杆径增大，圆杆内部的残余应力场逐渐趋于均匀，残余压应力层深度增大并趋于饱和。

The dynamic response of 2024 aluminum alloy round rod subjected to laser shocking is investigated by ABAQUS numerical simulation software. The attenuation characteristics of stress waves propagating along longitudinal and transverse direction as a function of propagating distance are systematically investigated and the effects of rod diameters on the attenuation of the peak of stress waves with propagating distance are also discussed. The effects of rod diameters on residual stress field are analyzed. The results indicate that the peak values of stress waves along longitudinal and transverse direction gradually decrease with increasing propagating distance, and the phenomenon of wave diffusion appears with stress wave propagation. The peak values of the stress waves attenuate fast first and then slow. With the diameter of round rod increasing, the residual stress field in the rod becomes more uniform and regular, and the depth of residual compressive stress increases and gradually reaches saturation.