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板带平直度和表面质量是生产高品质冷轧金属板带的主要因素。拉矫机(例如应用于连续热镀锌或精整生产线)通过板带较小的弹塑性变形,改善板带的平直度,降低残余应力,产生大张力,使板带在小直径辊系中被弯曲。在拉矫机的设计过程中,精确的模型是非常重要的,它可改进主要的参数,如板带的弯曲线,弯辊的反作用力,要求的张力等级,张力损耗(由于弹性变形引起的损耗)和传动功率需求。拉矫工艺的广延分析通常采用商用的有限元软件包进行,需要对底层物理效应和相互关系全面了解。然而,高达数百万的自由度需要有效的和可靠的三维有限元模拟,这导致运行时间太长而不可接受,甚至是对于现代大型机计算。为了减少大量的三维有限元模型计算成本(同时确保更多有意义的计算结果),开发了一个基于虚功原理和参数化形状函数的全新的、专业化的模型化方法,用于描述曲率和应变分布。相较于优化的有限元模型,这种度身订造的模型可以大幅减少自由度和计算成本,而关键的模拟结果却是相同的。由于这种方法的有效性和可靠性,此方法可用于在拉矫机设计阶段大规模的参数计算,包括优化工艺和设备,改善设备性能和显著减少能耗。
Strip flatness and surface quality are key factors in producing high quality cold rolled sheet metal. Tensile straightening machines, such as those used in continuous hot-dip galvanizing or finishing lines, improve the flatness of the strip and reduce the residual stress through the smaller elastic-plastic deformation of the strip, resulting in high tension, Be bent. In the design of straightening and straightening machines, accurate models are important in that they improve the main parameters such as the bending of the strip, the reaction force of the bending roller, the required tension level, the tension loss (due to elastic deformation Loss) and drive power requirements. Extensive analysis of straightening processes is usually performed using commercial finite element software packages and requires a thorough understanding of the underlying physical effects and interrelationships. However, up to millions of degrees of freedom require efficient and reliable three-dimensional finite element simulation, which leads to long run times unacceptable even for modern mainframe computations. In order to reduce the computational cost of a large number of three-dimensional finite element models (while ensuring more meaningful calculations), a new, specialized modeling approach based on the virtual work principle and parametric shape functions was developed to describe the curvature and Strain distribution. Compared to the optimized finite element model, this tailor-made model can significantly reduce the degree of freedom and computational costs, and the key simulation results are the same. Due to the effectiveness and reliability of this method, this method can be used for large-scale parametric calculations in the straightening machine design phase, including optimizing processes and equipment, improving equipment performance and significantly reducing energy consumption.