【摘要】 纵筋板是一种异型钢板，钢板的一面带有若干纵向凸筋，均匀分布的纵筋有利于提高钢板的结构强度并减少钢材用量，但筋高不均将严重影响纵筋板的刚度。针对轧制纵筋板的筋高沿宽向分布不均匀问题，即边部纵筋略低于其他纵筋，对次边部纵筋和边部纵筋及其相邻基板进行了受力分析，指出了造成宽向筋高分布不均的原因是孔型沟槽及边部金属对于金属横向流动的阻碍作用不同；采用ABAQUS有限元模拟计算软件建立了纵筋板轧制过程模拟计算模型，对比分析次边部纵筋和边部纵筋横断面上厚向、宽向和轧向的应力和应变分布，得出厚向应力偏差张量减小是边部纵筋高度降低的力学原因；在受力分析基础上，建立了避免边部筋高差的必要边部宽度的计算模型。在实验室内开展纵筋板轧制实验，基于模拟计算得出的规律，采用所建模型调整纵筋板侧边宽度，使纵筋板宽度方向上筋高的均匀性得到了保证，将实验所得的轧件外形与模拟计算结果对比，二者吻合较好。更多还原

【Abstract】 The plate with longitudinal ribs is a kind of special-shaped plate. One side of the plate is provided with several longitudinal convex ribs. The evenly distributed longitudinal ribs are conducive to improving the structural strength of the plate and reducing the amount of steel. However, the uneven rib height will seriously affect the stiffness of the plate with longitudinal ribs. In view of the uneven distribution of the rib height along the width direction of the rolled plate with longitudinal ribs, i.e. the height of the secondary edge longitudinal rib was higher than rib at the edge, the stress analysis of the ribs at the secondary edge and the edge, and the adjacent base plate was carried out. It point out that the reason for the uneven distribution of the rib height is that the grooves and the edge metal have different blocking effects on the transverse flow of the metal. The simulation calculation model of rolling process of the plate with longitudinal ribs was established by using ABAQUS, the finite element method simulation calculation software. The stress and strain distributions in the thickness, width and rolling directions on the cross sections of the secondary and the most edge longitudinal rib were compared and analyzed. It conclud that the reduction of the deviator stress tensor in the thickness direction is the mechanical reason for the decreasing of the rib height at the edge. Based on the stress analysis, the calculation model of the necessary edge width to maintain the uniformity of the rib height was established. The rolling experiment was carried out in the laboratory. By adjusting the side width using the model, the uniformity of the rib height in the width direction was improved. The shape of the rolled piece obtained from the experiment was in good agreement with the simulation result.更多还原