通过建立ANSYS/LS-DYNA有限元仿真模型,对激光冲击处理后靶材的残余应力场进行了有效的预测,对隐式分析前后模型的表面形貌进行了分析,对不同激光冲击参数下激光冲击强化产生的残余应力洞进行了分析。结果表明,增加峰值压力、冲击次数和光斑直径虽然可以改善激光冲击强化效果,增加最大残余应力,但同时也会增大残余应力洞现象,使用方形光斑可以有效减弱残余应力洞现象。 Through the establishment of ANSYS / LS-DYNA finite element simulation model, the residual stress field of the target after laser shock treatment is effectively predicted, and the surface topography of the model before and after implicit analysis is analyzed. Under different laser impact parameters, the laser Residual stress holes caused by impact strengthening were analyzed. The results show that although increasing the peak pressure, the number of impact and the spot diameter can improve the laser shock enhancement effect and increase the maximum residual stress, it also increases the residual stress cave phenomenon. The use of square flare can effectively reduce the residual stress cave phenomenon.