桩土接触
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在模拟费康书上的管桩桩土模拟问题时，桩竖向划分20个单元，就能计算，划分30个单元就出错。请大神指导。错误是这样的：Time increment required is less than the minimum specified
Abaqus/Standard Analysis exited with an error - Please see the message file for possible error messages if the file exists.
Abaqus/Standard Analysis exited with an error - Please see the message file for possible error messages if the file exists.
