分析中出现的问题

** WARNING 701360 ** Beam element   35600  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36103  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36104  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36105  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36106  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36107  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36108  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36109  has a very bad length/diameter ratio
  
** WARNING 701360 ** Beam element   36110  has a very bad length/diameter ratio
  
** WARNING 701380 ** Warnings were reported in the model
                     Check the mesh quality of the model   
请各位大哥帮忙,这是怎么回事,谢谢

流道或水路的单元划的太密了，控制长径在3.0左右。

谢谢你。