Based on the Archard wear formula and Hertz contact model,the numerical simulation model of locomotive gear wear considering dynamic wear coefficient was established,and the wear distribution of tooth surface was calculated under ideal condition.The finite element model of gear wear was established by the secondary development of the UMESHMOTION subroutine in ABAQUS and ALE adaptive mesh.After simulation,the tooth surface wear information was extracted by MATLAB,and the results of finite element calculation were compared with those of numerical simulation.The effects of friction factor and center distance error on tooth surface wear were studied by changing the model parameters.Based on the multi-body dynamics software SIMPACK,the vertical vibration displacement of the driven gear under wheel-rail excitation was obtained and loaded into the finite element model for simulation and calculation of tooth surface wear.Calculation results show that the gear wear distributions obtained by the two calculation methods are consistent,or in other words,the maximum wear depths of the driving and driven gears are at the root of the tooth,and the wear depth of the pitch line is 0.The wear depths of the alternating area of single and double teeth on both sides of the pitch line are abrupt.The total wear depth increases with the increase in friction factor,and all of them are located near the root of the tooth,with the pitch line as the boundary.When the maximum friction factor is 0.25,the total wear depth is 3.104 X 10-6 mm,while the opposing situation is observed at the tip of the tooth.When the center distance error is negative,the total wear depth increases with the decrease in the center distance,and the maximum value is 3.313 X 10-6 mm.However,when the center distance error is positive,the total wear depth changes slightly with the increase in the center distance.Wheel-rail external excitation will aggravate wear at the root of the tooth,affecting gear life and driving safety.1 tab,26 figs,31 refs.
维普
万方数据
