Combining different forms of statistical energy analysis to predict vibrations in a steel box girder comprising periodic stiffening ribs

Hao Luo; Zhiyang Cao; Xun Zhang; Cong Li; Derui Kong

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자료유형: 학술저널

저자정보: Hao Luo (Southwest Jiaotong University) Zhiyang Cao (Southwest Jiaotong University) Xun Zhang (Southwest Jiaotong University) Cong Li (Southwest Jiaotong University) Derui Kong (Southwest Jiaotong University)

저널정보: 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.45 No.1

발행연도: 2022.10

수록면: 119 - 131 (13page)

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Due to the complexity of the structure and the limits of classical SEA, a combined SEA approach is employed, with angle-dependent SEA in the low- and mid-frequency ranges and advanced SEA (ASEA) considering indirect coupling in the high-frequency range. As an important component of the steel box girder, the dynamic response of an L-junction periodic ribbed plate is calculated first by the combined SEA and validated by the impact hammer test and finite element method (FEM). Results show that the indirect coupling due to the periodicity of stiffened plate is significant at high frequencies and may cause the error to reach 38.4 dB. Hence, the incident bending wave angle cannot be ignored in comparison to classical SEA. The combined SEA is then extended to investigate the vibration properties of the steel box girder. The bending wave transmission study is likewise carried out to gain further physical insight into indirect coupling. By comparison with FEM and classical SEA, this approach yields good accuracy for calculating the dynamic responses of the steel box girder made of periodic ribbed plates in a wide frequency range. Furthermore, the influences of some important parameters are discussed, and suggestions for vibration and noise control are provided.

#bending wave #periodic ribbed plate #SEA #steel box girder #vibration

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