Reliability evaluation method for top beam of hydraulic bracket

A hydraulic support, reliable technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as deviation

Active Publication Date: 2015-11-04
贾志娟
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Problems solved by technology

At present, the two main non-probability models dealing with uncertain parameters are the interval model and the ellipsoid model. The shortcomings of the above two commonly used non-probability models are: first, the interval model assumes that all variables are independent of each other, while the ellipsoid model assumes that all variables are independent of each other. The variables are all related, and there may be some deviations from the actual engineering situation; second, in some cases, the minimum envelope convex set determined according to the sample information is not necessarily an interval model and an ellipsoid model, that is, an interval model and an ellipsoid model Not necessarily the best non-probabilistic model to describe uncertain parameters

Method used

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  • Reliability evaluation method for top beam of hydraulic bracket
  • Reliability evaluation method for top beam of hydraulic bracket
  • Reliability evaluation method for top beam of hydraulic bracket

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Embodiment Construction

[0043] like figure 1 Shown, reliability evaluation method of the present invention, comprises the following steps:

[0044] Step 1. Aiming at the uncertain parameters in the design of the hydraulic support top beam, determine the hyperellipsoid model describing the uncertain parameters. The specific process is:

[0045] Step 101, for the uncertain parameter vector x=[x 1 ,x 2 ,...,x k ] T Using a hyperellipsoid model to describe, determine the center of the hyperellipsoid The semi-axis of the hyperellipsoid a=[a 1 ,a 2 ,...,a k ] T , the semi-axis of the hyperellipsoid and x 1 ,x 2 ,...,x k-1 Angle α in the positive direction of the corresponding coordinate axis 1 ,α 2 ,...,α k-1 ; Wherein, k is the number of uncertain parameters in the hydraulic support top beam structure;

[0046] Step 102, through linear transformation L(x), construct a local coordinate system with the center of the hyperellipsoid as the origin and the semi-axis of the hyperellipsoid as the ...

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Abstract

The invention discloses a reliability evaluation method for a top beam of a hydraulic bracket. The method comprises the following steps: S1, determining a hyper-ellipsoidal model which describes uncertain parameters for uncertain parameters in a top beam design of the hydraulic bracket; S2, determining a main failure mode of the top beam of the hydraulic bracket and determining a corresponding functional function; S3, carrying out reliability analysis on the functional function to determine a reliability index; and S4, carrying out reliability evaluation on the top beam of the hydraulic bracket according to the reliability index. The method disclosed by the invention is simple in step and convenient to operate, can be used for carrying out reliability evaluation on the hydraulic bracket by effectively applying sample information, so that the reliability evaluation precision is improved, the evaluation result is effective and reasonable, and the method is strong in practicality, good in using effect and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of mine equipment safety evaluation, and in particular relates to a method for evaluating the reliability of a hydraulic support top beam. Background technique [0002] The hydraulic support is one of the important mechanical equipment in the fully mechanized coal mining face. It is mainly composed of a top beam, a column base, a push jack and a control valve. Its main function is to support the roof of the working face and provide sufficient work for the shearer. space. Among them, the top beam, as a component in contact with the roof, directly bears the pressure of the roof, and its working performance directly affects the overall performance of the hydraulic support. It is of great practical significance to make a reasonable safety assessment of its working performance. [0003] Existing performance evaluation methods of hydraulic support top beams are mainly carried out through finite element analysis a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 乔心州汪卫兵
Owner 贾志娟
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