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负荷分配是带钢热连轧精轧模型设定的基本问题,传统Newton-Raphson算法存在初始值要求严格、易发散等计算性能较差的缺点。针对其在求解非线性方程组方面的不足,基于行处理法提出了一套适用于热连轧机组快速厚度分配的计算模型。该方法以中间机架出口厚度为变量,在采用高精度、非简化轧制模型的基础上,计算速度快,弥补了传统方法的不足。同时为了加快收敛速度,根据经验统计提出了一种新的初始值的确定方法。并利用C++根据得出的算法编制了计算程序进行分析计算,在采用实测数据基础上的验证结果表明该算法具有运算速度快、收敛性好等优点。
Load distribution is the basic problem of hot strip rolling finishing model. The traditional Newton-Raphson algorithm has some disadvantages such as poor initial value and easy to diverge. Aiming at the shortcoming of solving nonlinear equations, a set of calculation model suitable for rapid thickness distribution of hot strip mill is proposed based on the line processing method. The method takes the outlet thickness of the middle rack as a variable, and based on the high-precision and non-simplified rolling model, the method has the advantages of fast calculation speed and remedies the shortcomings of the traditional methods. At the same time, in order to speed up the convergence speed, a new initial value determination method is proposed based on empirical statistics. Based on the obtained algorithm, C ++ is used to analyze and calculate the calculation program. The verification results based on the measured data show that the algorithm has the advantages of fast calculation speed and good convergence.