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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2012-07-01

发表刊物：ADVANCES IN STRUCTURAL ENGINEERING

收录刊物：Scopus、EI、SCIE

卷号：15

期号：7

页面范围：1139-1153

ISSN号：1369-4332

关键字：modal identification; temperature effect; spatial structure; dynamic characteristic; structural health monitoring

摘要：For the China National Aquatics Center, this paper reports an investigation into the effects of temperature change on modal parameters. Both analytical and field monitoring approaches were involved. Temperature-induced variations of structural member modulus of elasticity, internal forces and changes to boundary conditions were regarded as the essential factors influencing modal parameters. The contribution of these three effects on modal parameters for both uniform and non-uniform temperature distributions over the structure was investigated. It is concluded that temperature-induced internal forces affect the modal parameter values to greater extent than temperature-induced modulus of elasticity. The relationships between temperature and variation of modal parameters are different in the case of uniform and non-uniform temperature distributions. The analytical results were validated by using the acceleration and temperature measurements supplied by the China National Aquatics Center field monitoring system.