The Modal Analysis of a Kind of PKM Based on FEM

Based on ANSYS,FEA models of a kind of 6-UPS parallel kinematic machine and its substructures are constructed.Where after,the lower natural frequency,corresponding mode shape and animation are got by way of detailed modal analysis of them.Via the data processing of the results,the disciplinarian distributing of this machine's lower natural frequency in its working space is confirmed.So,it affords reliable references and supports for the 6-UPS PKM structure design and farther dynamical analysis.