CAJ | 학술논문

讨论了基于光滑粒子流体动力学(SPH)的压铸充型模拟的实施过程.建立了一种区分流体粒子和入流粒子的入流边界条件.对人工黏度和移动最小二乘法在处理压力振荡中的作用进行了对比.对最终模型在模拟压铸二维与三维的充型过程进行了验证.将SPH和有限差分的模拟结果与实验结果进行了对比研究.结果显示SPH与实验更为吻合,表明了SPH在描述充型过程流态方面的有效性与精度.
토론료기우광활입자류체동역학(SPH)적압주충형모의적실시과정.건립료일충구분류체입자화입류입자적입류변계조건.대인공점도화이동최소이승법재처리압력진탕중적작용진행료대비.대최종모형재모의압주이유여삼유적충형과정진행료험증.장SPH화유한차분적모의결과여실험결과진행료대비연구.결과현시SPH여실험경위문합,표명료SPH재묘술충형과정류태방면적유효성여정도.
The implementation of high pressure die casting (HPDC) filling process modeling based on smoothed particle hydrodynamics (SPH) was discussed.A new treatment of inlet boundary was established by discriminating fluid particles from inlet particles.The roles of artificial viscosity and moving least squares method in the present model were compared in the handling pressure oscillation.The final model was substantiated by simulating filling process in HPDC in both two and three dimensions.The simulated results from SPH and finite difference method (FDM) were compared with the experiments.The results show the former is in a better agreement with experiments.It demonstrates the efficiency and precision of this SPH model in describing flow pattern in filling process.