本人小白，學習用SPH方法模擬單軸壓縮試驗，壓頭底座和圓環都采用剛體，土體采用SPH顆粒進行分析。僅對底座和圓環設置了固定的邊界條件，壓頭僅允許豎向位移，土體顆粒無邊界條件，運行完后得到如下警告:

OP=NEW on *CONTACT is ignored when the general contact definition is specified as model data.

The option *boundary,type=displacement has been used; check status file between steps for warnings on any jumps prescribed across the steps in displacement values of translational dof. For rotational dof make sure that there are no such jumps. All jumps in displacements across steps are ignored

以下上傳inp文件，新手小白求大佬解答，不甚感激！！

SPH.zip