论文部分内容阅读
本文简要介绍了我国首次无缝线路直曲线实体轨道稳定性试验及其结果。试验采用了L_(?)(3~4)正交设计。试验结果表明:直线轨道的四个因素中以初弯矢度对稳定性的影响最为显著。曲线轨道以曲线半径的影响最为显著。临界力、临界温差分别为2276.54kN——70.6℃(直线)、2376.5kN——73.7℃(R=700m)、2208.92kN——68.5℃(R=500m)、2072.7kN——64.3℃(R=300m),且临界力、临界波长,临界矢度与初弯矢度、扣件扭矩之间都有规律性的变化。重轨轨道对稳定较为不利,道床肩宽、扣件类型、起道高度对稳定性的影响也很明显。 试验取得了轨道失稳的全过程资料。横竖向变形扣件随而发生,无先后规律。变形曲线的线型为正弦曲线。 轨道的安全储备系数:直线轨道为1.47,曲线轨道为1.53～1.55。
This paper briefly introduces the stability test and the result of the first straight-line real orbit in China. The experiment uses L _ (?) (3 ~ 4) orthogonal design. The experimental results show that the influence of initial curvature on the stability is the most significant among the four factors of linear orbit. Curve orbit to the curve radius of the most significant impact. The critical force and critical temperature difference are 2276.54kN - 70.6 ℃ (straight line), 2376.5kN - 73.7 ℃ (R = 700m), 2208.92kN - 68.5 ℃ (R = 500m) and 2072.7kN - 64.3 ℃ 300m), and the critical force, the critical wavelength, the critical angle and the first bend, fastener torque between the regular changes. Heavy rail orbit is more adverse to stability, shoulder bed width, fastener type, the effect of height on the stability is also obvious. The experiment obtained the whole process of orbital instability data. Transverse vertical deformation fastener occurs, no precedent. The deformation curve is sinusoidal. The safety reserve coefficient of the track: the straight track is 1.47, the curved track is 1.53 ~ 1.55.