Comparative Study on the Stress of Crossbeam with Contact or Rigid Connections between Guide Groove and Guide Rail
Take the crossbeam of cross-railway protective equipment as the research object,based on the"Design rules for cranes"and the construction process of protective equipment,the finite element cal-culation conditions for eight types of crossbeam were determined,and the loads on the protective equip-ment were calculated.The contact nonlinear analysis of crossbeam consumes a large amount of computa-tional resources.In order to explore ways to improve the efficiency of finite element analysis,a contact connection and a rigid connection were established between the guide groove and the guide rail,and the finite element calculation of the crossbeam under the two connection modes was performed.The results show that the maximum stress difference between the two connection methods of the crossbeam is relatively small,and the overall stress distribution is roughly the same.There is a significant difference in the maxi-mum stress value and stress distribution between the two connection methods at the guide groove and guide rail.If the maximum stress of the crossbeam does not occur at the guide groove and guide rail,using rigid connection to simulate the contact between the guide groove and the guide rail can improve the calculation efficiency.Otherwise,it is necessary to establish a non-linear contact between the guide groove and the guide rail to ensure calculation accuracy.
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