将足骨骼几何模型文件导入SOLIDWORKS 2017（美国Dassault Systemes）软件中，建立软骨。首先，利用三点建基准面的方法，建立软骨草图基准面，绘制软件草图，其次，使用拉伸凸台命令，拉伸出软骨三维模型。再次，使用等距曲面命令，等距连接软骨和骨骼上的面，距离设为20mm。最后，利用曲面切除命令，切掉软骨和骨骼重叠部分，删除曲面，得到软骨模型。文件格式保存为 SLDPRT 格式文件。

Import the foot bone geometry model file into SOLIDWORKS 2017 (Dassault Systems, USA) software to build cartilage. First of all, use the three-point method to build the datum plane of the cartilage sketch, and draw the software sketch. Second, use the stretch boss command to stretch out the three-dimensional model of the cartilage. Again, use the equidistant surface command to equidistant the faces on the cartilage and bone, and set the distance to 20mm. Finally, use the surface cutting command to cut off the overlapping part of cartilage and bone, delete the surface, and get the cartilage model. The file format is saved as SLDPRT format file.