In a coil box between the roughing and finishing stands on a hot strip mill,a problem has been encountered that the entry region of the plate touches the bending rolls and deforms.As a result,the defective coil occurs...In a coil box between the roughing and finishing stands on a hot strip mill,a problem has been encountered that the entry region of the plate touches the bending rolls and deforms.As a result,the defective coil occurs.The condition of plate bending,which forms a new deformation feature in coiling,is analyzed.In this paper,the authors focus on the research of the effects of coiling parameters,such as the thickness of plate,roll speed and feeding speed of plate in coil box,and on specific plate bending.A finite element method is developed to simulate this coiling process.Based on numerical simulation,the effects of the coiling parameters on the mechanics and deformation of the bending plate are obtained.Numerical simulation tests have verified the validity of the developed model.展开更多
文摘In a coil box between the roughing and finishing stands on a hot strip mill,a problem has been encountered that the entry region of the plate touches the bending rolls and deforms.As a result,the defective coil occurs.The condition of plate bending,which forms a new deformation feature in coiling,is analyzed.In this paper,the authors focus on the research of the effects of coiling parameters,such as the thickness of plate,roll speed and feeding speed of plate in coil box,and on specific plate bending.A finite element method is developed to simulate this coiling process.Based on numerical simulation,the effects of the coiling parameters on the mechanics and deformation of the bending plate are obtained.Numerical simulation tests have verified the validity of the developed model.
文摘为了解决正交异性钢桥面板的疲劳开裂问题,提出将热点应力法应用于其疲劳验算.该方法采用ANSYS子模型模块,通过国际焊接协会的线性外推方法,计算获得验算部位的热点应力.基于热点应力法给出正交异性钢桥面板的疲劳验算流程,对验算涉及的问题结合甬江桥实例进行了探讨.研究结果表明:与名义应力法相比,热点应力法可以反应正交异性钢桥面板疲劳开裂的实质;利用热点应力法对甬江桥正交异性钢桥面板加劲肋与横隔板连接部位的加劲肋进行疲劳验算,得出该构造细节的疲劳寿命为73 a.
