流固耦合瞬态分析错误求助

andersonchen

求助各位大大，我做了个气体管道泄漏的双向流固耦合瞬态分析模型，管厚16mm，泄漏孔径5mm，内压1MPa，刚算就出现以下错误：
+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction.             |
| Message:                                                           |
| CFX encountered the error: Read.  Fatal error occurred when reque- |
| sting Total Mesh Displacement for wall.                            |
  +--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction.             |
| Message:                                                           |
| cplg_SendCommand failed to send the command: ERROR -- CFX encount- |
| ered the error: Read.  Fatal error occurred when requesting Total  |
| Mesh Displacement for wall.                                        |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
|                    Writing crash recovery file                     |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction.             |
| Message:                                                           |
| Stopped in routine cplg_SendCommand                                |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
|                An error has occurred in cfx5solve:                 |
|                                                                    |
| The ANSYS CFX solver exited with return code 1.   No results file  |
| has been created.                                                  |
+--------------------------------------------------------------------+
查看了err文件，里面提示信息如下：
One or more elements have become highly distorted.  Excessive distortion of elements is usually a symptom indicating the need for corrective action elsewhere.  Try ramping the load up instead of step applying the load (KBC,1).  You may need to improve your mesh to  obtain elements with better aspect ratios.  Also consider the behavior  of materials, contact pairs, and/or constraint equations.  If this  message appears in the first iteration of first substep, be sure to  run shape checking of elements.

我的网格检查了，没问题，按错误提示好像是说引起了结构大应变，但我觉得这个压力应该不至于。另外我做了1mm泄漏孔的分析，能加压到3.5MPa，达到了极限屈服强度。希望懂的进来帮帮忙！感激不尽！


补充一下：第一个错误信息里的wall是我设置的流体耦合面的名称。