Time Response and Natural Frequency Analysis for Structures with Interval Parameters

This paper deals with the evaluations of lower and upper bounds of dynamic responses and natural frequencies for structures with uncertain interval parameters. The structural physical parameters, geometric dimensions and initial conditions can be considered as interval parameters. The modified Cheby...

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Published in:MATEC web of conferences 2023, Vol.382, p.1024
Main Authors: Feng, Xingxing, Cao, Chang, Liu, Min
Format: Article
Language:English
Subjects:
Chebyshev approximation
chebyshev interval method
finite element analysis
Frequency analysis
Initial conditions
interval uncertainty
Monte Carlo simulation
natural frequency
Parameter modification
Parameter uncertainty
Physical properties
Resonant frequencies
structure
Time response
Upper bounds
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Liu, Min
description This paper deals with the evaluations of lower and upper bounds of dynamic responses and natural frequencies for structures with uncertain interval parameters. The structural physical parameters, geometric dimensions and initial conditions can be considered as interval parameters. The modified Chebyshev interval method (MCIM) is presented to handle the uncertainties. In comparison with the Chebyshev interval method (CIM), MICM provides with tighter bounds of the time responses and natural frequencies without a significant increase in computation time. Monte Carlo method is also used to provide with exact bounds. MICM, CIM and Monte Carlo method are applied for structures with interval parameters, and the efficiency and accuracy of CIM and MCIM are verified.
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subjects Chebyshev approximation
chebyshev interval method
finite element analysis
Frequency analysis
Initial conditions
interval uncertainty
Monte Carlo simulation
natural frequency
Parameter modification
Parameter uncertainty
Physical properties
Resonant frequencies
structure
Time response
Upper bounds
title Time Response and Natural Frequency Analysis for Structures with Interval Parameters
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