隱式動力可以仿真完成，我把分析步全部改成顯示動力后，報錯了。我添加的邊界條件都是轉動，為什么動不了呢？轉動部分用的剛體約束，求大神指點下！

There is no element available in the model to control the stable time increment for Step 1. Please add a deformable element to control the stable time increment. Alternatively, you can use DIRECT TIME INCREMENTATION to perform the analysis at a user specified time increment.