Non-probability reliability sensitivity analysis method for a scraper conveyor chain wheel
A scraper conveyor, sensitivity analysis technology, applied in conveyors, transportation and packaging, instruments, etc., can solve problems such as heterogeneous uncertainty and homogeneous uncertainty
Active Publication Date: 2019-05-17
XIAN UNIV OF SCI & TECH
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Problems solved by technology
There are certain deficiencies in using the above two models to deal with the uncertain information of sprockets; There are correlations; on the other hand, there are heterogeneous uncertainties, such as material property parameters and geometric parameters, which are independent of each other; that is, for sprockets, it is the case where independent variables and correlated variables coexist
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[0028] like figure 1 Shown, the non-probabilistic reliability sensitivity analysis method of a kind of scraper conveyor sprocket of the present invention comprises the following steps:
[0029] Step 1. Determine the functional function of the scraper conveyor sprocket: use the response surface method to construct the functional function g(X) of the scraper conveyor sprocket and Among them, X is the uncertainty variable vector and X=(X 1 ,X 2 ,...,X m ) T , m is the total number of uncertain variables and m is equal to the dimension of the uncertain variable vector X, i and j are uncertain variable numbers, X i is the i-th uncertainty variable, X j is the jth uncertainty variable, the value ranges of i and j are both 1~m, a 0 is the coefficient of the constant term of the basis function with 1, a i for X i is the first-order coefficient of the basis function, a ii for is the coefficient of the quadratic term of the basis function, a 0 、a i and a ii Constitute the...
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The invention discloses a non-probability reliability sensitivity analysis method for a scraper conveyor chain wheel. The non-probability reliability sensitivity analysis method comprises the steps that 1, determining a function function of the scraper conveyor chain wheel; 2, determining a primary function coefficient matrix; 3, checking a complex correlation coefficient; 4, establishing a multi-dimensional parallelepiped convex model for describing uncertain variables; 5, standardizing the function; 6, determining a non-probability reliability index of the scraper conveyor chain wheel; And 7, determining the non-probability reliability sensitivity of the scraper conveyor chain wheel. According to the method, a function relation between a function fitting variable and a response value ofthe scraper conveyor chain wheel is constructed by using a response surface method; a mathematical method and a statistical method are combined; The method is suitable for solving the multivariate problem, the situation that independent variables and related variables coexist can be well handled by establishing a multidimensional parallelepiped convex model for describing uncertain variables, non-probability reliability sensitivity can be analyzed for the functional function of a linear or nonlinear scraper conveyor chain wheel, and the applicability is high.
Description
technical field [0001] The invention belongs to the technical field of non-probabilistic reliability sensitivity analysis, and in particular relates to a non-probabilistic reliability sensitivity analysis method of a scraper conveyor sprocket. Background technique [0002] The scraper conveyor sprocket is an important part of the scraper conveyor, and its reliability has a direct impact on the service life of the scraper conveyor. Reliability sensitivity can provide the internal relationship between reliability index and uncertain variable changes, and then provide a theoretical basis for reliability optimization design and reliability enhancement. Traditional reliability sensitivity analysis methods are based on probability models, which require a large amount of uncertain sample information to determine the probability distribution characteristics, which is difficult for scraper conveyors, because the design and manufacture of scraper conveyors are One piece, small batch,...
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IPC IPC(8): G06F17/18G06F17/15G06F17/50B65G19/20
Inventor 乔心州杨果黄兴
Owner XIAN UNIV OF SCI & TECH