This paper is based on laser shock peening (LSP) system with a flat-topped beam, using robot simulation software to determine the oblique shock angle of different areas of a certain turbine disk mortise. Three-dimensional finite element analysis was used to study residual stress field of Ni-based alloy GH4169 under flat-topped laser oblique shocking. The effects of different laser energy and different shocking number on residual stress field of Ni-based alloy GH4169 of LSP were studied. Three-dimensional finite element analysis used super-Gaussian beam distribution to construct spatial distribution model of shock wave induced by LSP. The simulation results were in good agreement with the experimental results. The research results will provide a theoretical basis for LSP of certain turbine disk mortise.

中文翻译：

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镍基合金GH4169的平顶激光斜向冲击残余应力场的数值模拟

本文基于带有平顶光束的激光冲击喷丸（LSP）系统，使用机器人仿真软件确定某个涡轮盘榫眼不同区域的倾斜冲击角。采用三维有限元分析方法研究了平顶激光斜冲击下Ni基合金GH4169的残余应力场。研究了不同的激光能量和不同的冲击数对LSP合金Ni基合金GH4169的残余应力场的影响。利用超高斯光束分布进行三维有限元分析，建立LSP诱发的冲击波空间分布模型。仿真结果与实验结果吻合良好。研究结果将为某些涡轮盘榫的LSP提供理论依据。