轮压荷载作用下钢轨-吊车梁腹板系统的若干问题研究

利用ANSYS对吊车梁-钢轨系统在轮压作用下的三个问题进行研究并给出相应结论:1)对钢轨间断的情况下腹板边缘的局部承压应力进行分析,提出相当于轨道连续时承压应力的放大系数;2)研究钢轨对腹板弹性屈曲的作用,结果发现,钢轨的作用仅限于扩散应力;在腹板上沿应力分布给定的情况下,上边缘钢轨的抗弯刚度对腹板的稳定性没有影响;3)对消除弯矩影响的腹板在承压应力作用下的屈曲进行分析,提出屈曲系数近似公式。

STUDY ON SOME KEY PROBLEMS RELATED TO CRANE BEAM-RAIL SYSTEM UNDER WHEEL PRESSURE

Three typical problems of the crane beam-rail system under wheel pressure were studied using ANSYS and the corresponding conclusions were given. Firstly,the local compressive stress on the edge of the crane beam web in discontinuous rail case was analyzed numerically. A formula for the maximum bearing stress amplification factor corresponding to the case of track discontinuity was brought up. Secondly,the contribution of rail flexural rigidity to the elastic stability of the web under wheel pressure was studied. It was found that the function of the rail was limited only to diffuse the stress; if the stress distribution on the web was given,the flexural rigidity of the upper edge rail had no impact on the web stability. Finally,the stability analysis of web without moment influence was conducted.And an approximate formula was proposed for elastic buckling coefficient of web under wheel pressure.