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为了研究带钢局部高点卷取起筋的控制方法,利用三维弹塑性变形基本理论,并引入带钢塑性流动因子,建立了弹塑性卷取应力和起筋量模型.基于应力函数假设、S.Timoshenko最小功原理和伽辽金虚位移法建立了起筋带钢的应力场分布和可用于在线计算的起筋临界卷取张力设定模型.仿真结果表明:局部高点在径向累积叠加所引起的带钢张力不均匀分布和轴向压应力是导致带钢起筋的主要原因;起筋量随局部高点高度、卷径和卷取张力增加而增大,薄带钢比厚带钢起筋量增幅明显;临界卷取张力随卷径、带钢厚度和局部高点高度增大而减小.
In order to study the control method of taking up the strip at the local high point, the elastic-plastic coiling stress and the amount of reinforcement were established by using the three-dimensional elastic-plastic deformation theory and introducing the strip plastic flow factor.Based on the assumption of stress function, .Timoshenko minimum work principle and the Galerkin virtual posterior shift method to establish the stress field distribution of the steel strip and can be used for on-line calculation of the threshold tensile strength of the tendons set model. Simulation results show that: local high points in the radial cumulative overlay The uneven strip tension distribution and axial compressive stress are the main reasons leading to the strip billets. The amount of strip billets increases with the increase of the local height, coil diameter and coiling tension. The amount of steel billet increased obviously; the critical winding tension decreased with the increase of coil diameter, strip thickness and local height.