The finite element (FE) analysis in this study is used to predict the effect of oscillation parameters on the temperature field and residual stress and as-welded distortion of 316 LN stainless steel weld joint. The simulated results indicate the simulation temperature field is good in agreement with the geometry morphology of actual weld metal (WM), and with the increase of oscillation frequency, the simulation temperature of WM gradually decreases. However, the temperature first decreases and then increases with the increase of amplitude. The residual stress concentrates on the WM and the surrounding heat-affected zone (HAZ). With the increase of oscillation frequency and amplitude of laser beam, the compressive stress converts to tensile stress, and the residual stress and the as-welded distortion gradually present a decreasing trend. The oscillation laser welding can alleviate the stress concentration phenomenon.

本研究中的有限元 (FE) 分析用于预测振荡参数对 316 LN 不锈钢焊接接头的温度场和残余应力和焊接变形的影响。模拟结果表明，模拟温度场与实际焊缝金属（WM）的几何形貌吻合较好，随着振荡频率的增加，WM的模拟温度逐渐降低。但随着振幅的增加，温度先降低后升高。残余应力集中在 WM 和周围的热影响区 (HAZ)。随着激光束振荡频率和振幅的增加，压应力转化为拉应力，残余应力和焊态变形逐渐呈减小趋势。