| The journal box positioning device is the key parts influencing running safety of locomotive.Along using of locomotive,insufficient journal box positioning stiffness would lead to low critical speed and serious lateral vibration,this also would lead to the failure of journal box link and rubber on journal box link.Those problems impact normal operation and running safety of locomotive seriously.With the increase of speed,those problem would become highlight.The locomotive axle load studied in the paper is33t.So the it belongs to high axle load locomotive.In order to obtain enough transverse journal box positioning stiffness,locomotive adopts triangle journal box link.This thesis includes the research of journal box positioning device to those problems.Based on comprehensive analysis of locomotive structure,this thesis established dynamics model of locomotive by SIMPACK software and used different methods to deal with the journal box positioning device in two models.The first method simplified off journal box and journal box link,second methods established journal box and journal box link models.The comprehensive journal box positioning stiffness of two models is equal.Then thesis analysis the dynamic performance of locomotive.Through the analysis,come to a conclusion that the dynamics performance of locomotive meet the design requirements.The influence of the variation of rubber bushing in journal box link to dynamics performance of locomotive was researched by analysing journal box positioning stiffness and locomotive dynamics simulation.The paper also researched the characteristic of triangle journal box link by contrasting components,structure,stress between triangle journal box link and another several journal box link.By using the simulation calculation,obtaining the load time history of rubber bushing in journal box link.The load spectrum of rubber bushing was formed by rain flow count method in the environment of MATLAB.Four points counting method was used in counting loop number. |
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