While the application of the Smoothed Particle Hydrodynamics (SPH) method for the modeling of welding processes has become increasingly popular in recent years, little is yet known about the quantitative predictive capability of this method. We propose a novel SPH model for the simulation of the tungsten inert gas (TIG) spot welding process and conduct a thorough comparison between our SPH implementation and two Finite Element Method (FEM) based models. In order to be able to quantitatively compare the results of our SPH simulation method with grid based methods we additionally propose an improved particle to grid interpolation method based on linear least-squares with an optional hole-filling pass which accounts for missing particles. We show that SPH is able to yield excellent results, especially given the observed deviations between the investigated FEM methods and as such, we validate the accuracy of the method for an industrially relevant engineering application.
翻译:近年来,在模拟焊接过程时采用滑动粒子流体动力学(SPH)方法已日益普及,但对于这种方法的定量预测能力却知之甚少。我们提出了一个新的SPH模型,用于模拟扁桃体惰性气体(TIG)点焊接过程,并对我们的SPH实施过程和基于两种微量元素法(FEM)模型进行彻底的比较。为了能够用基于电网的方法对我们的SPH模拟方法的结果进行定量比较,我们又建议采用基于线性最小方格的网格内插法改进粒子,以网格内插图法为基础,采用可选的填补洞口,记录缺失的粒子。我们表明,SPHM能够产生极好的结果,特别是考虑到所调查的FEM方法之间观察到的偏差,因此,我们验证了与工业有关的工程应用方法的准确性。