Structural reliability analysis-oriented common dynamic tracking sequence sampling method
A dynamic tracking and reliability technology, applied in the direction of complex mathematical operations, etc., can solve problems such as lack of adaptability to different problems, insufficient use of iterative information, evaluation results not fed back to the training point in real time to obtain and stop updating the model, etc. achieve good adaptability
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Embodiment 1
[0056] figure 1 The flow chart of the general dynamic tracking sequence sampling method for structural reliability analysis provided by the present invention includes five steps in total. This embodiment 1 introduces the operation steps of the analysis method of the present invention in detail with a two-dimensional application example as follows:
[0057] S1 Establish a reliability analysis model: analyze the failure mechanism of the structure to be tested, establish its limit state function, determine the random variables in the limit state function and the distribution information of the random variables, and establish the limit state function as follows:
[0058]
[0059] Among them, g(x) is the limit state function, x 1 and x 2 is a random variable, x 1 A normal distribution with a mean of 1.5 and a standard deviation of 1, x 2 Obey the normal distribution with a mean of 2.5 and a standard deviation of 1, that is, the distribution types of the two random variables a...
Embodiment 2
[0087] The present embodiment further illustrates the method of the present invention by carrying out reliability analysis to the roof truss, and adopts the analysis process of the method of the present invention as follows:
[0088] S1 establishes the limit state function of the roof truss, Image 6 (a)-(b) are the structural diagrams of the roof truss. The material of the upper chord and compression rod of the roof truss is reinforced concrete, and the material of the lower chord and tie rod is a certain type of steel. The uniformly distributed load q acts on the lower chord of the roof truss. The load can be converted to Image 6 (b) The nodal load shown in (b) is P=ql / 4. The failure mode of the truss is defined as the vertical deformation of the top node C is greater than 0.03m, and the limit state function of the truss force analysis is:
[0089]
[0090] Among them, Δ C Indicates the vertical deformation of node C, l is the length of the lower end of the truss, A ...
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