Robust Design Method for Base Reliability of High Speed ​​Press Considering Dynamic Characteristics

A technology with dynamic characteristics and robust design, applied in computing, special data processing applications, instruments, etc., it can solve the problems that the optimization results do not meet the robustness requirements, and the robustness and reduction of design goals are not considered.

Active Publication Date: 2017-12-12
ZHEJIANG UNIV
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Problems solved by technology

Zang Xianguo et al. published in "China Mechanical Engineering" in 2011 "Reliability Optimal Design of Dynamic Characteristics of Automobile Front Axle" with the goal of reducing the mass of the automobile front axle. When the probability distribution of basic random variables is known, the reliability analysis Combining with the optimization technology, a reliability optimization design method for improving the dynamic characteristics of the automobile front axle is proposed. However, when Zang Xianguo et al. Less than actual robustness needs
In addition, in actual engineering, the probability distribution of uncertainty factors is usually unknown

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  • Robust Design Method for Base Reliability of High Speed ​​Press Considering Dynamic Characteristics
  • Robust Design Method for Base Reliability of High Speed ​​Press Considering Dynamic Characteristics
  • Robust Design Method for Base Reliability of High Speed ​​Press Considering Dynamic Characteristics

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] Such as figure 1 As shown, the present invention considers the dynamic characteristics of a high-speed press base reliability robust design method, including the following steps:

[0043] (1) Establish a reliable and robust design model for the dynamic characteristics of the high-speed press base: take the high-speed press base as the design object, and take l 1 , l 2 and h are the main design parameters, and the elastic modulus E and Poisson's ratio ν of the base material are taken as the uncertainty parameters considered in the design. According to the rigidity requirements of the press base, the static first-order maximum deformation of the base is selected δ(x, U) As the design target, the midpoint of its interval value δ C (x) and radius δ W (x) is the objective function, with the base first-order natural frequency ω ...

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Abstract

The invention discloses a reliability and robust design method for a high-speed press base considering dynamic characteristics. The method includes the following steps: establishing a reliability and robust design model for the dynamic characteristics of a high-speed press base; adopting a Latin hypercube sampling method to analyze the design variables and Uncertain parameters are sampled, and the response value of the sample point is obtained through co-simulation technology; the RBF neural network model of the prediction target and the mechanical performance index value of the base in the constraint function is established according to the input-output information of the sample point; The optimal solution of the base design scheme is obtained by iteratively optimizing the double-layer nested genetic algorithm with uniformly distributed interval dominance and interval sequence bit vector. According to the actual design requirements of the high-speed press base, the present invention conducts a robust design of dynamic characteristics and reliability based on the RBF neural network model, and can conveniently obtain a design scheme of the high-speed press base that meets the reliability requirements and has robustness.

Description

technical field [0001] The invention relates to a reliable and robust design method for the base of a high-speed press considering dynamic characteristics. technical background [0002] During the working process of the high-speed press, its high-frequency punching force is transmitted and finally acts on its base. At the same time, the base at the bottom of the whole machine also bears the gravity from other parts and the inertial force of high-speed moving parts. The effect will cause vibration due to the effect of the excitation frequency. Studies have shown that if the natural frequency of the high-speed press base is close to the power frequency or double frequency, it will cause the base to resonate. Therefore, rationally designing the base structure so that the first few natural frequencies avoid the frequency of the working load can prevent the fatigue damage of the base structure and improve the reliability of the press and the life of the die. On the other hand, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06N3/12
Inventor 程锦吴震宇刘振宇谭建荣
Owner ZHEJIANG UNIV
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