Reliability design method of high-speed press force-applying components considering multi-type uncertainties

Abstract

The invention discloses a reliability design method of a force applying component of a high-speed press considering multiple types of uncertainties. The method includes the following steps: considering the random, interval and fuzzy uncertainties of high-speed press force components, choosing the minimum reliability value under the influence of three uncertainties as reliability index, establishing the stochastic model of high-speed press force components, and establishing the stochastic model of high-speed press force components; interval-Fuzzy mixed reliability design model; according to theconservation principle of entropy and '3 sigma criterion', a simplified stochastic-interval reliability design model; adopting Latin hypercube sampling and cooperative simulation technology, the Kriging model of function and objective function is constructed. The simplified reliability design model is decoupled from the reliability analysis to form a two-loop optimization solution. The inner loopuses adaptive step-size iterative method for reliability analysis, and the minimum value of reliability index is obtained. The outer loop uses genetic algorithm to optimize the design vector, and judges the feasibility of the design vector according to the reliability analysis results. When the maximum evolutionary algebra or convergence threshold is reached, the optimal solution is output.

Description

technical field [0001] The invention relates to a method for reliability design of force-applying parts of a high-speed press considering multi-type uncertainties. technical background [0002] The structural performance of the force-applying parts of the high-speed press directly affects the stamping accuracy and the service life of the supporting die. In order to ensure the stamping accuracy and the service life of the matching die, after determining the topological shape of the force-applying parts of the high-speed press, its size needs to be optimized to ensure its reliability. [0003] There are usually a large number of uncertain factors in the design and manufacture of high-speed presses, which will cause the performance of the press to deviate from the design expectations and fail to achieve the expected performance. However, the distribution characteristics of these uncertain factors are often multi-type. Traditional methods often ignore the diversity of these unc...

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Problems solved by technology

[0005] In order to solve the problem of reliability design of force application components of high-speed presses under the coexistence of multiple types of uncertain

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