振动分析中，ABAQUS 施加正弦位移，为什么会出现位移突变？ 100

振动分析中，ABAQUS 施加正弦位移，为什么会出现位移突变？

warning：

The option *boundary,type=displacement has been used; check status file between steps for warnings on any jumps prescribed across the steps in displacement values of translational dof. For rotational dof make sure that there are no such jumps. All jumps in displacements across steps are ignored

具体问题：将RP与图中节点耦合，在RP上施加图示位移，按正弦规律加载横向位移，为什么会出现位移突变这种warning呢