Dynamic analysis and reliability assessment of structures with uncertain-but-bounded parameters under stochastic process excitations

作     者：Duy Minh Do Gao, Wei Song, Chongmin Tangaramvong, Sawekchai 

作者机构：Univ New S Wales Sch Civil & Environm Engn Sydney NSW 2052 Australia 

出 版 物：《RELIABILITY ENGINEERING & SYSTEM SAFETY》 (可靠性工程与系统安全)

年 卷 期：2014年第132卷第0期

页      面：46-59页

核心收录：

学科分类：1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 0837[工学-安全科学与工程] 

基　　金：Australian Research Council 

主　　题：Interval random vibration Stochastic process excitation Reliability assessment Improved particle swarm optimization algorithm Uncertain-but-bounded parameters 

摘      要：This paper presents the non-deterministic dynamic analysis and reliability assessment of structures with uncertain-but-bounded parameters under stochastic process excitations. Random ground acceleration from earthquake motion is adopted to illustrate the stochastic process force. The exact change ranges of natural frequencies, random vibration displacement and stress responses of structures are investigated under the interval analysis framework. Formulations for structural reliability are developed considering the safe boundary and structural random vibration responses as interval parameters. An improved particle swarm optimization algorithm, namely randomised lower sequence initialized high-order nonlinear particle swarm optimization algorithm, is employed to capture the better bounds of structural dynamic characteristics, random vibration responses and reliability. Three numerical examples are used to demonstrate the presented method for interval random vibration analysis and reliability assessment of structures. The accuracy of the results obtained by the presented method is verified by the randomised Quasi-Monte Carlo simulation method (QMCSM) and direct Monte Carlo simulation method (MCSM). (C) 2014 Elsevier Ltd. All rights reserved.