Random Vibration Analysis of an Isolated Liquid Storage Tank with Uncertain Parameters
LIU Fupeng
YE Zhongzhi
SUN Xiaoxu
QIN Yuliang
WANG Lijia
SUN Yu
ZHANG Dongliang
LI Dechun
ZHANG Yue
DUAN Qinghao
Abstract：This paper addresses the uncertainty of structural parameters and investigates the random response of base-isolated liquid storage tanks under seismic excitation.First,the base-isolated liquid storage tanks is modeled based on the Haroun-Housner model,from which an equivalent linearized equation of motion is derived.Second,using the pseudo excitation method combined with polynomial dimensional decomposition,a random vibration anal-ysis of the base-isolated liquid storage tank with uncertain parameters is conducted,The results are compared with those from Monte Carlo simulation,confirming the effectiveness of the proposed method.Finally,based on the sur-rogate model established through the proposed method,the probability density of the response standard deviation of the liquid storage tank is computed,and the influence of the coefficient of variation on the response standard de-viation is analyzed.
Keywords：Base-isolation liquid storage tankSeismic excitationUncertain parametersPolynomial dimension-al decomposition methodPseudo excitation method
Publication Date：2026-02-28
Online Publishing Date：2026-03-03(First online date of this platform, not the publication date of the document)
Pages：9( 103-111 )