Multi-body dynamics calculation method for planet wheel uniform load coefficient

The invention provides a multi-body dynamics calculation method for a planet wheel uniform load coefficient. The multi-body dynamics calculation method comprises the following steps that S1, a finite element method is used for calculation to obtain the torsional rigidity of a planet carrier; s2, calculating modal formation and rigidity information of the planet carrier; s3, calculating modal formation and rigidity information of the planetary pin shaft part; s4, a rigidity-corrected planet carrier and pin shaft connection dynamic model is obtained; s5, establishing a gear and gear tooth meshing pair model; establishing a spline model; s6, extracting a rigidity curve of the bearing; s7, part machining and mounting errors are analyzed, an error evaluation result is obtained, design tolerance is analyzed, and a parameter correction result is obtained; s8, establishing an overall dynamic model; and S9, performing dynamic uniform load coefficient calculation based on the overall dynamic model to obtain the dynamic