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Probability density function solution of nonlinear oscillators subjected to multiplicative Poisson pulse excitation on velocity

Authors :
Zhu, H.T.
Er, G.K.
Iu, V.P.
Kou, K.P.
Source :
Journal of Applied Mechanics. May, 2010, Vol. 77 Issue 3, p31001, 7 p.
Publication Year :
2010

Abstract

The stationary probability density function (PDF) solution of the stochastic responses is derived for nonlinear oscillators subjected to both additive and multiplicative Poisson white noises. The PDF solution is governed by the generalized Fokker--Planck--Kolmogorov (FPK) equation and obtained with the exponential-polynomial closure (EPC) method, which was originally proposed for solving the FPK equation. The extended EPC solution procedure is presented for the case of Poisson pulses in this paper. In order to evaluate the effectiveness of the solution procedure, nonlinear oscillators are investigated under multiplicative Poisson white noise excitation on velocity and additive Poisson white noise excitation. Both weakly and strongly nonlinear oscillators are considered, respectively. In the numerical analysis, both the unimodal and bimodal stationary PDFs of oscillator responses are obtained with the EPC method and Monte Carlo simulation. Compared with the simulation results, good agreement is achieved with the presented solution procedure in the case of the polynomial degree being 6, especially in the tail regions of the PDFs of the system responses. [DOI: 10.1115/1.4000385] Keywords: nonlinear, oscillator, generalized FPK equation, probability density function, Poisson white noise

Details

Language :
English
ISSN :
00218936
Volume :
77
Issue :
3
Database :
Gale General OneFile
Journal :
Journal of Applied Mechanics
Publication Type :
Academic Journal
Accession number :
edsgcl.227797402