Reliability Design Method of Upper Beam of High Speed ​​Press

A design method and reliability technology, which can be used in computing, special data processing applications, instruments, etc., and can solve problems such as calculation errors of probabilistic model parameters and structural reliability.

Active Publication Date: 2017-11-10
ZHEJIANG UNIV
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Problems solved by technology

Probabilistic reliability analysis requires a large amount of sample data to obtain accurate probability distribution information about uncertain quantities. However, only very limited sample data can be obtained in engineering, and probabilistic reliability may be sensitive to the distribution information of random parameters. That is, a small error in the parameters of the probability model can cause a large error in the calculation of the structural reliability

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  • Reliability Design Method of Upper Beam of High Speed ​​Press
  • Reliability Design Method of Upper Beam of High Speed ​​Press
  • Reliability Design Method of Upper Beam of High Speed ​​Press

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with drawings and embodiments.

[0059] Such as figure 1 Shown, the present invention a kind of high-speed press upper beam reliability design method, comprises the following steps:

[0060] (1) Establish a reliability design model for the upper beam of a high-speed press that describes uncertain factors in intervals:

[0061] Select the upper beam of a certain type of high-speed press as the research object, such as figure 2 Shown as its 1 / 4 model, according to the actual design requirements, to Figure 4 The cross-sectional dimension h of the upper and middle beams 1 、h 2 , l 1 , l 2 and l 3 Design variables for the size, with image 3 The external force P shown 1 ,P 2 ,P 3 The density ρ is the uncertainty factor described in the interval, and the deformation is the optimization design goal. The maximum allowable stress of the upper beam is [60,61] MPa, and the reliability requirement is ...

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Abstract

The invention discloses a reliability design method for an upper beam of a high-speed press. It includes the following steps: select the design variables according to the reliability requirements in the actual beam design, and establish a reliability design model of the beam on the high-speed press that describes the uncertainty factors in intervals; use LHS to obtain the sample points required for fitting Kriging in the experimental design, The objective function and constraint function values ​​corresponding to each sample point are obtained through co-simulation technology, and the Kriging model is constructed based on this; the reliability constraint value in the reliability design model is calculated based on the uniform interval dominance; The double nested genetic algorithm searches for the optimal design scheme that meets the reliability requirements. According to the actual reliability requirements of the upper beam of the high-speed press, the present invention uses the dominance degree of uniformly distributed intervals in the reliability design to calculate the reliability index value, and can conveniently obtain the design scheme of the upper beam of the high-speed press that meets the reliability requirements.

Description

technical field [0001] The invention belongs to the field of high-speed press design, in particular to a reliability design method for an upper beam of a high-speed press. technical background [0002] The performance of high-speed presses directly affects the precision, performance and production efficiency of stamping products. As an important part of high-speed presses, the upper beam has a direct and important effect on the overall working performance and processing accuracy of the press. influences. In order to improve the machining accuracy and work efficiency of the press, and reduce production costs and energy consumption, it is necessary to reduce the weight of the upper beam while increasing the stiffness and strength of the upper beam as much as possible. Therefore, it is necessary to target high stiffness and light weight. reliability design. [0003] In the actual design and manufacture of high-speed presses, there are certain uncertain fluctuations in the str...

Claims

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Application Information

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