目的 优化喷丸强化工艺，提升喷丸工艺的强化效果。方法 采用预定义场和基于移动矢量的快速建模方法，实现满足表面全覆盖和不同喷丸方法的有限元模拟。通过对模拟结果中的应力值进行局部坐标转换，分析不同喷丸方法条件下残余应力沿受喷构件表面切线方向的分布规律。结果 在喷射方向固定的喷丸方法中（方法-1），弹丸撞击角度在不同区域内的变化范围为60°~90°，且随弹丸撞击角度的增加，弹丸撞击时的动能消耗率和应变能转变率分别由71.6%和5.3%提高到89.0%和7.5%，表面覆盖率也随之增加。在喷射角度固定的喷丸方法中（方法-2），弹丸撞击角度始终为90°，表面覆盖率分布均匀，从而使得在凸圆弧面、斜面和凹圆弧面内采用方法-2获得的表面残余应力比方法-1的大，且两者差值沿+x方向呈现先增加、后保持稳定、再减少的变化规律。结论 与喷射方向固定的喷丸方法相比，采用喷射角度固定的喷丸方法，因弹丸撞击角度大，弹丸撞击动能消耗率及应变能转变率高，且表面全覆盖能得以保证，构件在凸圆弧面、斜面和凹圆弧面内能获得较大的表面残余压应力值。

The work aims to optimize the shot peening process and further improve the strengthening effect of shot peening. The finite element modelling in conformity with full surface coverage and different shot peening methods was established by the predefined field and the rapid modeling method based on moving vector. The distribution rule of residual stress along with the tangential direction of the peened component surface by different shot peening methods was analyzed through the local coordinate conversion of stress in the simulation results. As for the shot peening method with fixed direction (method-1), the impact angle in different areas changed within 60° to 90°. As the impact angle increased, the consumption rate of kinetic energy and conversion rate of strain energy during impaction respectively increased from 71.6% and 5.3% to 89.0% and 7.5% and the surface coverage increased as well. As for the shot peening method with fixed angle (method-2), the impact angle was always 90° and surface coverage was evenly distributed so that the residual stress induced by shot peening method-1 was larger than that in shot peening method-2 in convex arc surface, oblique surface and concave arc surface. The difference value between the stresses increased first, then kept stable, and finally decreased along with the +x direction. Compared with the shot peening method with fixed direction, the shot peening method with fixed angle is adopted, because the consumption rate of kinetic energy and the conversion rate of strain energy during the impact are higher due to larger impact angle and the full surface coverage can be ensured. Therefore, larger surface residual stress can be obtained in convex arc surface, oblique surface and concave arc surface of the component.