TranslatingMotion_2D中衔铁材料B-H线怎么选择

xiaonizilily

最近TranslatingMotion_2D中遇到一问题，保存时报错
16:11:59     38 sec. End writing
Conductive region : SIGMA must be <> 0
Face region GAG_BIT unsuitable material for this formulation
Conductive region : SIGMA must be <> 0
Face region VALVE_SHAFT unsuitable material for this formulation
No writing of the physical description of the problem
on the .TRA file, and no writing of the possible circuit.
... end saving project
像是说GAG_BIT 和VALVE_SHAFT材料设置有问题
但是我在静态分析时没有这错误
瞬态分析时只是改了机械属性设置为mobile

xiaonizilily

哪位高手帮忙解决一下啊