The Multi-Objective Optimal Design Of The Y Rolling Mill

The finite element method is the most widely used numerical calculation in today's engineering analysis.The analysis software ANSYS can simultaneously carry on the structural, thermal, fluid, electromagnetic, acoustic and more senior physics field coupling analysis. The basal principle that the software's objective design optimization module applies is as follows. Adopting the curve fitting method and complex quadratic equation to form man-made the approximative function expression about objective function and constraint function, modulus of functions is determined through error by the weighted least squares method.then through iterative optimization by make use of various optimization method to obtain the objective function extremum.The dissertation use Y rolling mill rolling aluminum as entity model. Based on the research production of predecessor and investigation of the author, corresponding rolling force and boundary constraints are determined. Then build a parametric model in the ANSYS to perform the static analysis. Roller is optimized through multi-objective optimization method, we obtain nephograms of stress and displacement curves from optimization process. Comprehensive evaluation of fuzzy math is applied to identify the best optimization program.The three-dimensional models of rolling are established with Pro/E. Based on the dynamics module LS-DYNA, the procedure of rolling aluminum is simulated. The nephograms of stress and strain of rolling deformed area and the curve of roll force during rolling are obtained. Compared the result with the other result which comes from optimization, the precision of calculation will be verified.