Stationary response of colored noise excited vibro-impact system*

Wang, Jianlong; Leng, Xiaolei; Liu, Xianbin

doi:10.1088/1674-1056/abf12a

Cited by 1 publication

(1 citation statement)

References 38 publications

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“…There are many other approximate methods reported in the literature, which are possible to be applied to solving the problem of response of quasi-Hamiltonian systems, including cell mapping method, [16,17] exponential-polynomialclosure (EPC) approach, [18,19] and deep learning. [20][21][22] These approaches mentioned above have their advantages and shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Semi-analytical stationary response prediction for multi-dimensional quasi-Hamiltonian systems

Chen

Yuan

et al. 2022

Chinese Phys. B

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In science and engineering, the majority of non-linear stochastic systems can be represented as the quasi-Hamiltonian systems. Moreover, the corresponding Hamiltonian system offers two concepts of integrability and resonance that can fully describe the global relationship among the degrees-of-freedom (DOFs) of the system. This paper proposes an effective and promising approximate semi-analytical method for the stationary response of multi-dimensional quasi-Hamiltonian systems. To be specific, the trial solution of the reduced Fokker-Plank-Kolmogorov (FPK) equation constructs with radial basis function (RBF) neural networks. Then taking into account the residual generated by substituting the trial solution into the reduced FPK equation, a loss function is constructed by combining random sampling technique, and the unknown weight coefficients are optimized by minimizing the loss function through the Lagrange multiplier method. Moreover, an efficient sampling strategy is employed to promote the implementation of algorithms. Finally, two numerical examples are studied in detail, and all the semi-analytical solutions are in contrast with Monte Carlo simulations (MCS) results. The results indicate that the complex non-linear dynamic features of the system response can be captured through the proposed scheme accurately.

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