Abstract
The dynamic response of moored crane-ship is studied. Governing equations for the dynamic response of a crane-ship coupled with the pendulum motion of the payload are derived based on Lagrange’s equations. The boom is modeled based on finite element method, while the payload is modeled as a planar pendulum of point mass. The dynamic response was studied using numerical method. The calculation results show that the large-amplitude responses occur at wave periods near the natural period of the payload. Load swing angle is smaller for crane-ship with flexible boom, in comparison with rigid boom. The ship surge motions have large vibrations for crane-ship with flexible boom, which were not observed for a rigid boom. The analysis identifies the significance of key parameters and reveals how the system design can be adjusted to avoid critical conditions.
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Project supported by the National Natural Science Foundation of China (No. 50675077) and the Research Fund for the Doctoral Program of Higher Education of China (No. 20050487047)
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Ren, Hl., Wang, Xl., Hu, Yj. et al. Dynamic response analysis of a moored crane-ship with a flexible boom. J. Zhejiang Univ. Sci. A 9, 26–31 (2008). https://doi.org/10.1631/jzus.A071308
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DOI: https://doi.org/10.1631/jzus.A071308