Model design and updating for experiment of ring shaped TLD control of high-rise steel chimney
Both experiment design and numerical model updating for high-rise structure with ring shaped tuned liquid damper (TLD) are investigated in this paper.According to a real high-rise structure,a scaled model structure for the dynamic experiment was designed,using the similitude law of the structural mode lacking artificial mass.Both the lumped mass model and finite element model of the scaled structure were established,and its dynamic characteristics were compared with the real structure,so as to validate the rationality of the scaled model.The frequency and damping ratio of the scaled model were obtained from free damping experiment.Also,the applicability of wireless sensor in the dynamic test of high-rise structures was discussed using the experimental data.A model updating method using genetic algorithm was proposed and programmed,then a numerical simulation was conducted using structural stiffness and base rotational stiffness as variables to study both static and dynamic characteristics.The results show that the designed model can meet the similitude and reflect the dynamic behavior of the real structure in some degree.And the proposed method is a numerical model updating method with high efficiency,as it can converge within only 50 iterations.The work may offer both experimental and numerical models for the further investigations of vibration control experiment of the high-rise steel chimney with ring shaped TLD.
国家科技期刊平台
NSTL
万方数据
维普
