The paper analyses the stability of rib slab on method of energy, the formula of longitudinal critical force is deduced, and rational arrangement of stiffening rib is discussed.
利用能量法分析了加肋平板的稳定问题，推导了纵向临界力的计算公式，并探讨加劲肋的合理布置。
2
The causes of surface longitudinal cracking were analyzed. Countermeasures were put forward based on the production practices of thin slab casting and rolling at Tonghua Steel Co.
分析了连铸薄板坯表面纵向裂纹的产生原因，结合通钢薄板坯生产实际情况，提出了改进措施。
3
The results show that the surface longitudinal crack of hot-roll Q345B medium plate is caused by inclusion and surface longitudinal crack of slab.