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发布时间：2022-06-30

论文类型：期刊论文

发表时间：2022-06-29

发表刊物：计算力学学报

所属单位：建设工程学部

期号：6

页面范围：770-776

ISSN号：1007-4708

摘要：It is big challenging to identify the damage of the structures accurately in civil engineering , since the structures usually are huge ,complex ,and insensitive to local damage .Aiming at this problem , Adding virtual mass method is proposed for improving the sensitivity of every substructure ,and realizing the accurate identification of global structure .First ,The frequency response with addition mass is con-structed using the knowing the excitation and acceleration response by virtual distortion method (VDM ) ,w hich is a fast structural reanalysis method ;then the quantity of mass and the according select natural frequency w hich high sensitivity are determined by the sensitivity analysis and the relationship between the mass and natural frequency ;last ,the damage of the global structure can be identified pre-cisely using the combined natural frequencies of the all the virtual structures ,of w hich each is construc-ted by adding mass on the according substructure .A finite element model of a plan frame with 2 floors is used to verify the proposed additional virtual mass method .

备注：新增回溯数据