Design And Optimization Of Planetary Educer-box’s Flexible Connection Under Impact Loading

In this paper, the main research is to study the flexible connecting structure ofplanetary reducer-box, the mechanical mode under impact loading of it is deduced.Then, the mechanical mode is verified by taking XE-93Yaw Reducer for example.The working environment of planetary reducer is very bad, and opening is veryfrequent. During working, because of the unreasonable design for it, the flexibleconnecting structure of planetary reducer is more likely to damage, and thedestruction of it will lead to the planetary reducer’s overall failure directly. So it isnecessary to study and optimize the flexible connecting structure of planetaryreducer-box.In this thesis, the main research contents are as follows:(1) A more detailed stress analysis is given to flexible connecting structure ofplanetary reducer-box. An exploration is effective for the study of the flexibleconnecting structure by means of the finite element analysis software ABAQUS. So Itis clear that stress distribution、force condition and failure mode of the forth level boxconnecting under impact loading combining with experiments. Because tressdistribution and force condition the of the elastic pin is more complex in assembly andimpacting process, in this paper some secondary factors have overlooked about itbased on mechanics theory and experiments;(2) The mechanical model of the flexible connecting structure of planetaryreducer-box is established. The mechanics relation among the number of high strengthbolts, number of elastic pin and magnitude of the impact loading is derived;(3) The optimization model of flexible connecting structure of planetaryreducer-box is established by means of the Optimized Design theory. We obtain anideal optimization result by the iterative computation of the “fmincon function” inthe optimal toolbox of MATLAB;(4) A simplified finite element analysis model is established in the finite elementsoftware ABAQUS. Through the analysis and calculation, the quantitative proportionbetween the bolts and elastic pins is false, the elastic pins don’t play a good bufferrole;(5) In this paper, we establish an ideal finite element analysis model based on theoptimization result, in order to find the quantitative proportion between the bolts and elastic pins. Through calculation and analysis further, the ability to resist impactloading of flexible connecting structure of planetary reducer-box is improved, thisprovides an ideal train of thought for the flexible connecting structure of planetaryreducer-box.