Applied Mathematics and Mechanics (English Edition) ›› 2023, Vol. 44 ›› Issue (2): 207-220.doi: https://doi.org/10.1007/s10483-023-2941-6

• 论文 • 上一篇    下一篇

Random vibration of hysteretic systems under Poisson white noise excitations

Lincong CHEN1,2, Zi YUAN1, Jiamin QIAN1, J. Q. SUN3   

  1. 1. College of Civil Engineering, Huaqiao University, Xiamen 361021, Fujian Province, China;
    2. Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province, Xiamen 361021, Fujian Province, China;
    3. Department of Mechanical Engineering, School of Engineering, University of California, Merced, CA 95343, U.S.A.
  • 收稿日期:2022-07-16 修回日期:2022-09-14 发布日期:2023-02-04
  • 通讯作者: J. Q. SUN, E-mail: jqsun@ucmerced.edu
  • 基金资助:
    the National Natural Science Foundation of China (No. 12072118), the Natural Science Funds for Distinguished Young Scholar of Fujian Province of China (No. 2021J06024), and the Project for Youth Innovation Fund of Xiamen of China (No. 3502Z20206005)

Random vibration of hysteretic systems under Poisson white noise excitations

Lincong CHEN1,2, Zi YUAN1, Jiamin QIAN1, J. Q. SUN3   

  1. 1. College of Civil Engineering, Huaqiao University, Xiamen 361021, Fujian Province, China;
    2. Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province, Xiamen 361021, Fujian Province, China;
    3. Department of Mechanical Engineering, School of Engineering, University of California, Merced, CA 95343, U.S.A.
  • Received:2022-07-16 Revised:2022-09-14 Published:2023-02-04
  • Contact: J. Q. SUN, E-mail: jqsun@ucmerced.edu
  • Supported by:
    the National Natural Science Foundation of China (No. 12072118), the Natural Science Funds for Distinguished Young Scholar of Fujian Province of China (No. 2021J06024), and the Project for Youth Innovation Fund of Xiamen of China (No. 3502Z20206005)

摘要: Hysteresis widely exists in civil structures, and dissipates the mechanical energy of systems. Research on the random vibration of hysteretic systems, however, is still insufficient, particularly when the excitation is non-Gaussian. In this paper, the radial basis function (RBF) neural network (RBF-NN) method is adopted as a numerical method to investigate the random vibration of the Bouc-Wen hysteretic system under the Poisson white noise excitations. The solution to the reduced generalized Fokker-PlanckKolmogorov (GFPK) equation is expressed in terms of the RBF-NNs with the Gaussian activation functions, whose weights are determined by minimizing the loss function of the reduced GFPK equation residual and constraint associated with the normalization condition. A steel fiber reinforced ceramsite concrete (SFRCC) column loaded by the Poisson white noise is studied as an example to illustrate the solution process. The effects of several important parameters of both the system and the excitation on the stochastic response are evaluated, and the obtained results are compared with those obtained by the Monte Carlo simulations (MCSs). The numerical results show that the RBF-NN method can accurately predict the stationary response with a considerable high computational efficiency.

关键词: random vibration, Bouc-Wen hysteresis system, non-Gaussian excitation, Poisson white noise excitation, radial basis function (RBF) neural network (RBF-NN)

Abstract: Hysteresis widely exists in civil structures, and dissipates the mechanical energy of systems. Research on the random vibration of hysteretic systems, however, is still insufficient, particularly when the excitation is non-Gaussian. In this paper, the radial basis function (RBF) neural network (RBF-NN) method is adopted as a numerical method to investigate the random vibration of the Bouc-Wen hysteretic system under the Poisson white noise excitations. The solution to the reduced generalized Fokker-PlanckKolmogorov (GFPK) equation is expressed in terms of the RBF-NNs with the Gaussian activation functions, whose weights are determined by minimizing the loss function of the reduced GFPK equation residual and constraint associated with the normalization condition. A steel fiber reinforced ceramsite concrete (SFRCC) column loaded by the Poisson white noise is studied as an example to illustrate the solution process. The effects of several important parameters of both the system and the excitation on the stochastic response are evaluated, and the obtained results are compared with those obtained by the Monte Carlo simulations (MCSs). The numerical results show that the RBF-NN method can accurately predict the stationary response with a considerable high computational efficiency.

Key words: random vibration, Bouc-Wen hysteresis system, non-Gaussian excitation, Poisson white noise excitation, radial basis function (RBF) neural network (RBF-NN)

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