采用动力松弛法计算出现下面问题的原因是什么

fengfeng213

*** WARNING ***                        
ANSYS LS-DYNA run is done with 1 WARNING.                              
   Please check the message File.

部分message文件：
Use this restart dump if you want to restart the
dynamic relaxation and re-converge to a tighter tolerance
Use the next restart dump to restart as a transient analysis
*** Warning 40515 (SOL+515)
      Velocities cannot be reinitialized
      after restart to account for geometry
      changes whenever:
      1. "INIT" option is specified on
         command line during the initial run.
      2. dynamic relaxation restart dumpfile
         is used to restart run.