我在建立地下隧道盾構管片的模型，管片采用三維實體單元建模，但是為了簡化，管片間的螺栓使用的是二維桁架單元簡化，桁架單元會斜穿兩個面，一直計算不收斂，然后報這個警告For two-dimensional models, if a non-unity thickness is specified for two-dimensional solid elements and these elements are involved in an interaction such as contact, the same thickness should be specified for the out-of-plane thickness of the corresponding surface under *surface interaction.是哪里設置有問題或者講究嗎?