This study aims to investigate influence of under- and over-treatment on residual stress state induced by HFMI numerically. Finite element simulations were performed using a flat plate model considering S355 where feed rate and the number of hits were varied. To reduce computational time, the mass scaling method was adopted to the simulations. In addition, in order to survey influence of surface removal on residual stress state, electropolishing was conducted after the HFMI simulation. Additional simulations were performed on bead on plate model considering JIS-SM400 in order to investigate applicability of isotropic hardening model for residual stress estimation. From the results, the mass scaling method can result in reducing computational time more than 90% with reasonable good estimation of the residual stresses.The investigations regarding under- and over-treatment reveal that high feed rate mainly influences residual stress state on the treated surface and the number of hits is independent of amount of induced residual stress. Surface removal after the simulation can result in slightly improving the accuracy of the estimated residual stresses. The simulations to bead on plate model give reasonable results in a depth of around 0.2 mm even when the residual stresses due to welding is disregarded.

本研究旨在数值研究处理不足和过度处理对 HFMI 引起的残余应力状态的影响。有限元模拟是使用平板模型进行的，考虑到 S355，其中进给速率和命中次数是变化的。为了减少计算时间，在模拟中采用了质量缩放方法。此外，为了考察表面去除对残余应力状态的影响，在HFMI模拟之后进行了电解抛光。为了研究各向同性硬化模型在残余应力估计中的适用性，我们对考虑 JIS-SM400 的压筋板模型进行了额外的模拟。从结果来看，质量缩放方法可以将计算时间减少 90% 以上，同时对残余应力进行合理的良好估计。关于处理不足和过度处理的调查表明，高进给率主要影响处理表面的残余应力状态，并且撞击次数与诱导残余应力的量无关。模拟后的表面去除可以稍微提高估计残余应力的准确性。即使不考虑焊接产生的残余应力，板模型上的焊缝模拟也能在大约 0.2 毫米的深度给出合理的结果。