Natural frequency and vibration shape are the important reference index in structural design which bear dynamic load

modal analysis can determine the natural frequency and vibration shape.The parameterization of three-dimensional auxiliary design for gear assembly based on SolidWorks and its plug-in unit GearTrax is carried out

and the model file is exported to ANSYS through special interface

then it is solved by finite element method.It is aimed at the problem that the static linear modal analysis method can not meet the need of complex working conditions

similar problem is efficiently solved through counting the natural frequency in two critical states

and determining the scope of systemic natural frequency.