万向轮螺旋滚子受压变形的有限元分析

Finite element analysis on compressive deformation for helix rollers of universal wheel

根据螺旋滚子曲面重构得到的数据,利用Pro/E软件进行了三维实体建模,在ANSYS软件中建立滚子的有限元模型,并进行受力变形的有限元仿真,得到了变形图和位移云图.对仿真结果进行了分析,找到了滚子在轴线方向和垂直方向的最大位移处,为合理选材提供了依据.结果证明,螺旋滚子在受压变形下,实际轮廓线会偏离理论理想轮廓线.为了使全方位移动平台运行平稳精确,需要在滚子设计制造时,考虑受力变形的影响.分析结果对于提高平台的运动精度和承载力,使其更好地推广应用具有重要意义.

According to the surface reconstruction data of helix rollers, a 3D solid model is first established via Pro/ETM. Then, a roller finite element modeling, together with the loading deformation simulation, is conducted using ANSYSTM to obtain deformation diagrams and displacement nephograms. By analyzing the simulation results, the maximum roller displacements in the axial and vertical directions are next detected for rational material selection. Finally, it is found from results that, when the helix roller is compressively deformed, the actual contour is different from theoretically-ideal contour. To guarantee the precision and stability of omni-directional moving platform operations, the loading deformation is considered with roller design and manufacturing. Therein, the analysis results delivers a applicable significance upon platform kinematical precision and loading capability enhancement.