High-speed press slider mechanism size optimization method based on interval constraint violation degrees

Abstract

The invention discloses a high-speed press slider mechanism size optimization method based on interval constraint violation degrees. The method comprises the following steps: firstly establishing a high-speed press slider mechanism size optimization model based on interval variables; then establishing a polynomial response surface model capable of predicating values of an object function and a constraint function; Solving the slider mechanism size optimization problem based on the interval variables by utilizing two nested genetic algorithms; calculating the upper and lower limits of object and constraint intervals corresponding to all individuals in an outer-layer genetic optimization process by utilizing the inner-layer genetic algorithm and the polynomial response surface model so as to obtain corresponding interval midpoints and radiuses, and calculating the corresponding interval constraint violation degrees; performing good and bad sequencing on all the individuals in an outer-layer genetic optimization population by utilizing preferable relation maxim of an interval sequence, so as to determine the adaptability; when the out-layer optimization achieves maximal evolutionary algebra, outputting the individual with the greatest adaptability value as an optimal solution. The method disclosed by the invention can be used for truly realizing the press slider mechanism size optimization in which the interval uncertainity is considered.

Description

technical field [0001] The invention relates to a size optimization method of a slider mechanism of a high-speed press based on interval constraint violation degree. technical background [0002] As the key force-applying part of the high-speed press, the design of the slider mechanism has a direct and important impact on the performance of the high-speed press. In order to ensure the precision of stamping products and the service life of supporting dies, after determining the topological shape of the slider mechanism of the press, its size needs to be optimized to increase the rigidity of the slider as much as possible, and to ensure that its weight and strength meet the requirements of customers. need. [0003] In the actual design and manufacture of high-speed presses, there are usually certain uncertainties in the material properties of the sliders, and only the range of variation can be determined. Traditional methods often ignore these uncertainties, establish a dete...

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Problems solved by technology

[0005] In order to solve the size optimization problem of the high-speed press slider mechanism with uncertain parameters in actual engineering, and to overcome the loss of uncertainty information and the It is difficult to reflect the insufficiency of the nature of the uncertainty optimization problem. The present invention provides a method for optimizing the size of the slider mechanism of a high-speed press based on interval constraint violations, and establishes an optimization model for the slider mechanism of a high-speed press based on interval variables. Violation degree and superiority relation criterion realize the direct solution of interval optimization model, avoiding the conversion process from interval optimization model to deterministic model

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