激光喷丸强化技术是一种新型的材料表面改性技术相比于传统喷丸强化技术,具有明显的优势。采用试验与有限元分析相结合的方法，探讨了在一定冲击顺序下，多点激光喷丸强化处理后紧固孔周围残余应力的分布情况。结果表明，通过多个直径为2.6 mm光斑的组合能形成一个直径近似为6 mm的较大圆形冲击区域，可用来替代大直径光斑进行冲击强化。在多点激光喷丸强化过程中，由于多个光斑叠加，导致冲击区域的表面残余压应力幅值由第一点冲击后的134 MPa增加到冲击结束后的254 MPa，冲击区域变形深度也逐渐增大到26.6 μm。在冲击区域钻孔后，紧固孔孔口边缘处的最大残余压应力值明显减小。模拟值与实验值吻合较好。

Laser shock peening is a novel material surface modification technique, which is superior to conventional shot peening technology. The experiments and finite element analysis method are combined, the residual stress distribution of the fastener hole after laser shock peening is discussed under certain impact order. The results show that the combination of several small spots with diameter of 2.6 mm can lead to a large circular processed area of nearly 6 mm in diameter, which can replace a single large spot for shock peening. The amplitude of the surface residual stress is increased from 134 MPa after the first impact to 254 MPa after multiple laser shock peenings, and the maximum depth of shocked region is also gradually enhanced to 26.6 μm. After hole drilling in the shocked region, the maximum residual stress around the fastener hole edge decreases sharply. The simulation value agrees well with the experimental value.