请高手进来看!

   先看看问题:
  
** WARNING 701360 ** Beam element   78147  has a very bad   length/diameter ratio
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** WARNING 702352 ** Element   74394  and   77126  are overlapping or too close. The analysis may not be able to resolve these problem elements during analysis. It is recommendedthat you improve the mesh in the region of these elements.
  
Analysis Check completed successfully with 263 warnings
  
这是在cool分析时出来的问题,上面的warning(Beam element的)我看过了,是指流道(就是"has a very bad length/diameter ratio"). 但是fill分析的时侯一点没问题呀!!! 下面的warning就不懂了.高手指点一下吧!(上面所有的warnings都是这两类的.)