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Global Response Sensitivity Analysis of Randomly Excited Dynamic Structures

Abhinav, S and Manohar, CS (2016) Global Response Sensitivity Analysis of Randomly Excited Dynamic Structures. In: JOURNAL OF ENGINEERING MECHANICS, 142 (3).

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Official URL: http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.00010...

Abstract

The response of structural dynamical systems excited by multiple random excitations is considered. Two new procedures for evaluating global response sensitivity measures with respect to the excitation components are proposed. The first procedure is valid for stationary response of linear systems under stationary random excitations and is based on the notion of Hellinger's metric of distance between two power spectral density functions. The second procedure is more generally valid and is based on the l2 norm based distance measure between two probability density functions. Specific cases which admit exact solutions are presented, and solution procedures based on Monte Carlo simulations for more general class of problems are outlined. Illustrations include studies on a parametrically excited linear system and a nonlinear random vibration problem involving moving oscillator-beam system that considers excitations attributable to random support motions and guide-way unevenness. (C) 2015 American Society of Civil Engineers.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
Keywords: Random processes; Dynamic analysis; Sensitivity analysis; Delay time; Nonlinear systems; Random vibration
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 07 Apr 2016 07:13
Last Modified: 07 Apr 2016 07:13
URI: http://eprints.iisc.ernet.in/id/eprint/53620

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