Structure damage localization of the slab track by adding virtual masses
In this paper,a damage localization method based on additional virtual mass and dynamic test of simple harmonic excitation is proposed.Firstly,when additional masses are added to the structure,a large number of virtual structures can be constructed; then the virtual construction formula is derived in order to obtain the dynamic response of virtual structures without adding real mass.After dynamic test of simple harmonic excitation,the dynamic response of virtual structures can be obtained using the acceleration response and virtual construction formula.Furthermore,when the applied harmonic excitation frequency is close to the natural frequency of the structure,the structural response can reach a maximum by adding advisable mass and the mass value can be calculated.When the local structure is damaged,the extreme value and the corresponding position of the additional mass are found by adding mass at different positions in the structure.Thus,the approximate location of the damage is determined according to the results.Finally,the numerical simulation of the elastic foundation beam model simplified by track structure is carried out,and the results show that the damage can be localized.
structural health monitoring damage identification slab track virtual mass
J.Hou S.Wang (L).Jankowski
Department of Civil Engineering & State Key Laboratory of Coastal and Offshore Engineering,Dalian Un Department of Civil Engineering,Dalian University of Technology,Dalian,China Institute of Fundamental Technological Research,Polish Academy of Sciences,02-106,Warsaw,Poland
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1368-1373
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）