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Dynamic response analysis of a moored crane-ship with a flexible boom
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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.
dynamic responsemoored crane-shipfinite element methodrigid-flexible coupling dynamic model
Hui-li REN、Xue-lin WANG、Yu-jin HU、Cheng-gang LI
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School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2008
Journal of Zhejiang University, Science A. Applied Physics & Engineering
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NSTL
