【摘要】 分析了传统的核函数产生压缩失稳现象的原因,提出了消除这种压缩失稳现象的一种新的核函数。采用改进的光滑粒子法,对几种常用的核函数进行了一维应变波的对比计算。结果表明:所提出新的核函数在应力波计算中不但保证了计算精度,还能有效地消除压缩失稳。更多还原

【Abstract】 The numerical compression instability induced by the traditional kernel functions was discussed. A new kernel function was proposed to eliminate the instability. Numerical analyses of unistrain waves with different kernel functions were performed by using corrected smoothed particle hydrodynamics (CSPH) method. The results show that the new kernel function eliminates the compression instability and ensures the numerical calculation accuracy.更多还原