基于等效模型的砖石古塔有限元模型修正方法  

Finite element model fast correction method for ancient masonrypagoda based on equivalent model

作　　者：杨庆山[1] 张源浩 刘纲[1] 王晖 YANG Qingshan;ZHANG Yuanhao;LIU Gang;WANG Hui(School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《振动与冲击》2024年第3期105-109,共5页Journal of Vibration and Shock

摘　　要：针对砖石古塔实体有限元模型节点众多导致修正效率低下问题,提出了一种将实体模型和杆系模型相结合的有限元模型快速修正方法。基于古塔结构的测试输出信号,使用随机子空间法识别了塔的自振频率。使用整体连续式方法建立了ABAQUS有限元模型,基于实测结果,使用萤火虫算法修正了塔的弹性模量、密度。修正后的有限元模型的计算结果与实测结果对比,能够较好吻合,说明修正后的模型可靠,可以作为后续抗震性能分析的基础。Here,aiming at the problem of low correction efficiency caused by numerous nodes in solid finite element model for ancient masonry pagoda,a fast correction method of finite element model combining a solid model and a linkage system model was proposed.Based on test output signals of ancient masonry pagoda structure,the stochastic subspace method was used to identify natural frequencies of the pagoda.The global continuity method was used to establish ABAQUS finite element model of the pagoda.Based on actually measured results,the firefly algorithm was used to modify elastic modulus and mass density of the pagoda.It was shown that the calculation results of the revised finite element model agree better with measured results,so the revised model is reliable to be able to serve as the basis for subsequent aseismic performance analysis.

关 键 词：砖石古塔 有限元模型 模型修正 等效模型 萤火虫算法 

分 类 号：TU364[建筑科学—结构工程] TU365