Thank you. I have seen this discussion before. But what I need is not the nodal coordinates after deformation. In fact, I want to extract coordinates of the nodes which are located on the boundary of my volumetric mesh (the volumetric mesh was generated from stl file which is a surface mesh originally). After extracting the coordinates of boundary nodes, I can then get the displacement of these nodes (combined with other results) and further use them as boundary condition of fem (In other words, I want to load the displacement of boundary nodes). Also I want to know how to apply displacement of many certain nodes in Ansys (maybe using apdl?). I guess my problem is quite infrequent because I have been looking through many forums but still can't find the proper way to solve it. Your help is greatly appreciated!