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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2008, Vol. 9 Issue (1): 26-31    DOI: 10.1631/jzus.A071308
Civil and Mechanical Engineering     
Dynamic response analysis of a moored crane-ship with a flexible boom
Hui-li REN, Xue-lin WANG, Yu-jin HU, Cheng-gang LI
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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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.

Key words： Dynamic response      Moored crane-ship      Finite element method      Rigid-flexible coupling dynamic model     
Received: 12 June 2007      Published: 14 December 2007
CLC:  U615.35  
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Hui-li REN
Xue-lin WANG
Yu-jin HU
Cheng-gang LI
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Hui-li REN, Xue-lin WANG, Yu-jin HU, Cheng-gang LI. Dynamic response analysis of a moored crane-ship with a flexible boom. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(1): 26-31.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A071308     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2008/V9/I1/26

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