Functional gradient continuum structure lightweight design method considering reliability
A lightweight design, functional gradient technology, applied in design optimization/simulation, computer-aided design, calculation, etc., can solve problems such as inapplicability, high calculation cost, imperfect theory, etc., to achieve the effect of strong engineering applicability
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[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0051] Such as figure 1 As shown, the present invention proposes a lightweight design method for a functionally graded continuum structure considering reliability, comprising the following steps:
[0052] Step 1: Based on the improved economic index MMWDC (Modified Minimum Weight with a Displacement Constraint, MMWDC) model and FORM (First Order Reliability Method, FORM) reliability analysis method, establish the objective function, displacement constraints, reliability constraints and convergence The topology optimization RBTO-MMWDC-FGM model of the FGM continuum structure considering the reliability of the criterion is as follows:
[0053]
[0054] In the formula, E n is the n-dimensional Euclidean space, W is the structural mass, t is the design variable, is the intrinsic mass of unit i under load condition l, f w (t) is the quality ...
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