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为了研究带钢局部高点卷取过程起筋的控制方法,基于应力函数假设和S Timoshenko最小功原理获得了起筋带钢的应力场分布,并采用伽辽金虚位移原理建立了可用于在线计算的起筋临界卷取张力设定模型和起筋弹性极限模型。并对应力场分布和临界卷取张力各影响因素进行仿真研究,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;临界卷取张力随带钢厚度、局部高点高度和卷取半径增大而减小,带钢宽度对钢卷的起筋临界卷取张力影响非常小。通过与实际生产控制方法和ANSYS有限元分析结果对比,验证了本模型的计算精度和可行性。
In order to study the control method of the billets during the winding process of the local high spot, the stress field distribution of the billets was obtained based on the stress function hypothesis and S Timoshenko’s minimum work principle. The Galerkin virtual displacement principle was used to establish the controllable billets Calculation of the critical tensioned tension setting model of tendon and the elastic limit model of tendon. The simulation results of the influencing factors of the stress field distribution and the critical coiling tension are given. The simulation results show that the uneven distribution of tension and the axial compressive stress caused by the accumulation of local high points in the radial direction are the causes of the stress The main reason is that the critical winding tension decreases with the thickness of the strip, the height of the local high point and the coiling radius. The width of the strip has little effect on the critical coiling tension of the coil. By comparing with actual production control method and ANSYS finite element analysis, the calculation accuracy and feasibility of this model are verified.