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Coupled Dynamic Analyses of Underwater Tracked Vehicle and Long Flexible Pipe  

Hong, Sup (Ocean Engineering Research Department, MOERI/KORDI)
Kim, Hyung-Woo (Ocean Engineering Research Department, MOERI/KORDI)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.13, no.3, 2008 , pp. 237-245 More about this Journal
Abstract
We developed a computational method on coupled dynamics of tracked vehicle on seafloor and long flexible pipe. The tracked vehicle is modeled as rigid-body vehicle, and the linked flexible pipe is discretized according to a lumped-parameter model. The equations of motion of the rigid-body vehicle on the soft seafloor are combined with the governing equations of flexible pipe dynamics. Four Euler parameters method is used to express the orientations of the vehicle and the flexible pipe. In order to solve the nonlinear coupled dynamics of vehicle and flexible pipe an incremental-iterative formulation is implemented. For the time-domain integration $Newmark-\beta$ method is adopted. The total Jacobean matrix has been derived based on the incremental-iterative formulation. The interactions between the dynamics of flexible pipe and the mobility of the tracked vehicle on soft seafloor are investigated through numerical simulations in time domain.
Keywords
Coupled Dynamics; Tracked Vehicle; Flexible Pipe; Euler Parameter; Incremental-iterative Formulation;
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