Modal Analysis Of Gear Drive With Parallel Structure Of Double Row Gears Based On Substructure Method

Planetary gear drive system is widely used in many fields such as vehicles,ships,robots,industrial machinery,etc.It has the advantages of strong bearing capacity and high precision.When the drive system is in working state,its own frequency may be close to its working frequency or rotation frequency of parts,causing resonance phenomenon and leading to the occurrence of accidents.In view of this,this paper adopts the substructure method to conduct modal analysis on Gear Drive with Parallel Structure of Double Row Planetary Gears.According to the analysis results,the structure of Gear Drive with Parallel Structure of Double Row Planetary Gears is optimized.According to the principle of substructure division,the Gear Drive with Parallel Structure of Double Row Planetary Gears was divided into shell substructure,drive substructure and output substructure,and the three-dimensional model of substructure was established by 3D drawing software.The three-dimensional model of the substructure was imported into the pre-analysis software,and materials were added to the three-dimensional model of the substructure,boundary conditions were imposed and the finite element mesh was divided to establish the analysis model of the substructure,and the pre-processing of the modal analysis was completed.The modal analysis of the key components and substructures was carried out by using the finite element analysis software,and then the modal information of each substructure was extracted.The modal synthesis was carried out according to the substructure method,and the overall modal analysis results of Gear Drive with Parallel Structure of Double Row Planetary Gears were obtained.The computational accuracy and efficiency of substructure method and integral finite element method are compared and analyzed.The mass matrix and the stiffness matrix after the modal synthesis of the substructure method are modified by the Berman correction method in the matrix model modification method,so that the modal analysis results of the modified substructure method are close to the modal analysis results of the integral finite element method,and the accuracy of the modal analysis results of the substructure method is improved.The key parts of the planetary gear and the planetary frame of the planetary gear drive system were optimized,and then the modal analysis of the optimized parts,substructures and the whole drive system structure was carried out to improve the Gear Drive with Parallel Structure of Double Row Planetary Gears.The modal analysis of the optimized Gear Drive with Parallel Structure of Double Row Planetary Gears was carried out by using the substructure method and Verify the conclusion that the model modification technique can improve the accuracy of the results of the substructure method.Figure[37]Table[39]Reference[72]...