IMA-SVM Based Cable Force Reliability Analysis Model for Cable-Stayed Bridges
Aiming at the problems of large amounts of calculation and low efficiency of reliability calculation of long-span cable-stayed bridges,a reliability calculation method based on an improved Ephemera algorithm and sup-port vector machine(IMA-SVM)is proposed.The standard mayfly algorithm is improved by using the Logistic chaos map initialization strategy,nonlinear decreasing gravity coefficient and sub-generation Gaussian mutation operation.The benchmark function is introduced to compare the optimization performance of the Mayfly algorithm under the sin-gle strategy and the mixed strategy improvement,and it is used to solve the optimal parameters of the support vector machine and the extremum of the structural implicit function.The results show that the convergence speed and accu-racy of the hybrid strategy improved Ephemera algorithm are greatly improved.The maximum error of IMA-SVM fit-ting the structural function in the test set is only 1.53%.IMA has a high efficiency in solving the implicit function of cable force reliability of long-span cable-stayed bridges,and the minimum value of cable force reliability is 3.831,which verifies the applicability of the proposed method to practical projects.
Reliability calculationMayfly algorithmSupport vector machineLong span cable-stayed bridgeCable force
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