基于惩罚函数混合法的连铸结晶器振动参数优化与仿真分析

Vibration parameter optimization and simulation analysis of continuous casting mould based on penalty function mixing method

以某钢铁厂的结晶器振动装置为研究对象,针对该振动装置在生产中坯料宽度改变时出现结晶器下沉现象,对其进行优化。以该结晶器内液体拉坯摩擦力为优化目标,以振动频率、振幅、拉坯速度为变量,采用惩罚函数混合法对其进行建模优化,得出液体内摩擦力最小情况下的变量取值。最后利用Fluent软件对结晶器内钢水凝固状况进行仿真,得出该结晶器的最优振动参数下结晶器内钢水的凝固情况:钢水的流动速度、液相分布系数、钢水等温分布图。

In this paper, a crystallizer vibration device in a steel plant is taken as the research object. In order to solve the problem ofmould sinking when the width of the billet is changed in the production of the vibration device, the optimization of the vibration deviceis carried out. With the liquid in the mold casting friction as the optimization objective and the vibration frequency and amplitude, thecasting speed as variables, the penalty function method is used to optimize the mixed model and the variables of liquid under the condi-tion of minimum inner observation are obtained. Then using Fluent software to simulate the solidification of molten steel in the mold con-dition, solidification of molten steel in mold optimal vibration parameters is obtained in the crystallizer （ under the molten steel flow ve-locity, liquid phase distribution coefficient of molten steel, isothermal distribution） .