求助：ls-dyna模拟颗粒冲击靶板提示颗粒惯性张量过小

模拟半径5微米颗粒以350m/s速度倾斜冲击靶板。第一次采用的单位系统是m，kg，s，求解出现错误如下：
*** Error 30186 (INI+186)
the inertia tensor of rigid body # 2
is too small for the accuracy of the computer to handle.
Please add mass or increase inertia.
slave surface of interface = 1
type = 14
surface timestep = 8.155E-11
controlling slave node ID = 15379
part ID of slave node = 2
current minimum time step = 8.155E-11
master surface of interface = 1
type = 14
surface timestep = 7.173E-10
controlling master node ID = 2
part ID of master node = 1
current minimum time step = 8.155E-11
The LS-DYNA time step size should not exceed 8.155E-11
to avoid contact instabilities. If the step size is
bigger then scale the penalty of the offending surface.
提示rigid body#2即颗粒的惯性张量过小，在网上发现一个解决办法是换另一套单位系统mm，g，s。尝试之后出现了同样的错误。请求各位指点迷津。另附上log的txt