High-rigidity and light-weight design method considering uncertainty of slide block mechanism of press machine

Abstract

The invention discloses a high-rigidity and light-weight design method considering uncertainty of a slide block mechanism of a press machine. The high-rigidity and light-weight design method comprises the steps of: establishing a high-rigidity and light-weight design model considering the uncertainty of the slide block mechanism of the press machine; adopting an optimized Latin hypercube sampling method for a test design, obtaining a target function response value corresponding to each sample point through collaborative simulation and building a Kriging agent model; converting an uncertain target function into a certain target function based on an order relation of interval numbers; and calculating a target function interval by utilizing an internal structure analysis way, finding a Pareto optimal solution collection of a converted certain optimal problem by utilizing a multi-target genetic algorithm, if the precision requirement is not satisfied, performing important sampling at the place where the extreme value of the target function interval locates, and updating the target function sample collection and the agent model to perform iterative optimization. The high-rigidity and light-weight design method considering uncertainty of the slide block mechanism of the press machine, disclosed by the invention, has the advantages of establishing the uncertain optimization model of the slide block mechanism according with the practical project for solving and really realizing the light-weight and high-rigidity design of the slide block mechanism.

Description

technical field [0001] The invention relates to a high-rigidity and light-weight design method for a slider mechanism of a press in consideration of uncertainty. technical background [0002] The performance of the high-speed press directly affects the precision, usability and production efficiency of stamping products, and the design of the slider mechanism, which is the key force-applying part of the press, has a particularly important impact on the overall performance of the high-speed press. In order to improve the machining accuracy and work efficiency of the press, and reduce production costs and energy consumption, the weight of the slider should be reduced as much as possible while increasing the stiffness of the slider. Therefore, it is necessary to optimize the design with the goal of high stiffness and light weight of the press slider. [0003] Existing structural optimization designs are generally based on definite system parameters and optimization models, and ...

AI Technical Summary

Problems solved by technology

Among them, the nonlinear interval number optimization algorithm based on interval structure analysis converts two-layer nested optimization into single-layer optimization, which has high computational efficiency, but the outer layer optimization needs to repeatedly call a very time-consuming numerical analysis model; while the approximate The nonlinear interval number optimization algorithm of model technology uses an approximate model instead of a numerical analysis model, which improves the computational efficiency, but there are still two-level nested optimization problems, and the convergence speed of the approximate model needs to be further improved

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