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万能型钢轧机机架圆角直接影响机架的应力分布、纵向和横向变形,从而影响机架的强度、刚度、寿命、H型钢的精度和尺寸。根据万能型钢轧机机架的受力特点和几何对称性,建立机架的有限元模型。利用有限元软件ANSYS分析机架圆角对其应力分布及位移的影响。把改进的带精进策略的非支配分类遗传算法(NSGA)和有限元相结合,建立新的优化方法。并用BP神经网络建立非支配分类遗传算法(NSGA)的适应度函数。以机架的纵向位移和体积为目标函数,利用这种新的优化方法和ANSYS自带的零阶和一阶优化方法优化万能型钢轧机机架圆角,与ANSYS自带的零阶和一阶优化方法相比,这种新的优化方法取得了良好的优化效果。
Universal steel mill frame fillet directly affects the stress distribution of the rack, vertical and horizontal deformation, thus affecting the rack strength, stiffness, life, H-beam accuracy and size. According to the stress characteristics and geometric symmetry of the universal steel mill stand, the finite element model of the stand is established. Using Finite Element Analysis Software ANSYS to Analyze the Effect of Frame Roundness on Its Stress Distribution and Displacement. Combining the improved non-dominated classification genetic algorithm (NSGA) with the finite element method, a new optimization method is established. The fitness function of non-dominated classification genetic algorithm (NSGA) is established by BP neural network. Taking the longitudinal displacement and volume of the frame as the objective function, this new optimization method and the zero-order and first-order optimization methods of ANSYS are used to optimize the rounding of the universal steel mill stand. Compared with the zero order and the first order Compared with the optimization method, this new optimization method has achieved good optimization results.