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Structural Engineering and Mechanics Volume 53, Number 2, January25 2015 , pages 297-309 DOI: https://doi.org/10.12989/sem.2015.53.2.297 |
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Disturbance analysis of hydropower station vertical vibration dynamic characteristics: the effect of dual disturbances |
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Baoping Zhi, Zhenyue Ma
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| Abstract | ||
| The purpose of this work is to analyze the effect of structure parameter disturbance on the dynamic characteristics of a hydropower station powerhouse. A vibration model with a head-cover system is established, and then the general disturbance problem analysis methods are discussed. Two new formulae based on two types of disturbances are developed from existing methods. The correctness and feasibility of these two formulae are validated by analyzing the hydropower station powerhouse vibration model. The appropriate calculation method for disturbance of the hydropower station powerhouse vibration dynamic characteristics is derived. | ||
| Key Words | ||
| hydropower station; transfer path; stochastic perturbation method; Hadamard product; linear stochastic structure; time-invariable parameters; dual disturbances; dynamic characteristics | ||
| Address | ||
| Baoping Zhi: School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, No.2 Linggong Road, Dalian, Liaoning Province, 116023 China; University Engineering Technology Research Center of Small Watershed Conservancy of Henan Province, No.1 Dongjing Avenue, Kaifeng, Henan Province, 475004 China Zhenyue Ma: School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, No.2 Linggong Road, Dalian, Liaoning Province, 116023 China | ||