关键词: 四辊轧机机座, 结构参数, 优化设计, 改进粒子群算法, 惩罚函数法

Abstract:

In order to get some reasonable parameters and best performance of a structure,taking the minimum bounce value of frame as an objective,a mathematical model for optimal design of the 4-roller rolling mill frame was established under the conditions that the frame met the requirements for structure,strength, stiffness and others.Considering the defects existed in the conventional optimal algorithm and standard particle swarm optimization algorithm used for dealing with complex mechanical systems,an IPSO algorithm was proposed which included three kinds of strategies,Logistic map initiating
the population chaotically,nonlinear dynamic improving inertial weights and adjusting accelerated factor.The structural parameters of a 4-roller rolling mill frame was designed optimally by using an improved penalty function method and an IPSO algorithm.The results
 verify that the improved algorithm proposed  is correct and effective.

Key words: 4-roller rolling mill frame, structural parameter, optimal design, improved particle swarm optimization(IPSO), penalty function method