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14 May 2020 Dynamics Model of Buoy Unpowered Heave Considering Seawater Density
Shaobo Yang, Luyan Li, Xingfei Li, Fang Liang, Xia Zhang, Wei Sun
Author Affiliations +
Abstract

Yang, S.; Li, L.; Li, X.; Liang, F.; Zhang, X., and Sun, W., 2020. Dynamics model of buoy unpowered heave considering seawater density. In: Zheng, C.W.; Wang, Q.; Zhan, C., and Yang, S.B. (eds.), Air-Sea Interaction and Coastal Environments of the Maritime and Polar Silk Roads. Journal of Coastal Research, Special Issue No. 99, pp. 439-446.

The Deep-sea Autonomous Profile Buoys (DSAPB) are a new type of underwater buoys and they can dive to the deep sea below 4000m. Considering dynamic models of conventional underwater vehicle could not adequately satisfy the motion characteristic of DSAPB, a nonlinear dynamic model for the motion simulation of DSAPB is developed in this paper. In the model, the effect of sea water density change is taken into consideration and a viscous hydrodynamic calculation method satisfying the motion characteristic of DSAPB. The buoyancy variation is introduced into the standard hydrodynamic equation to simplify the DSAPB hydrodynamic equation, and the Motion of Planar Mechanisms (PMM) experiment is simulated by means of Computer Fluids Dynamics (CFD). The hydrodynamic coefficients in the equation are obtained and the DSAPB dynamic model is obtained which provides theoretical basis for effective control of DSAPB.

©Coastal Education and Research Foundation, Inc. 2020
Shaobo Yang, Luyan Li, Xingfei Li, Fang Liang, Xia Zhang, and Wei Sun "Dynamics Model of Buoy Unpowered Heave Considering Seawater Density," Journal of Coastal Research 99(sp1), 439-446, (14 May 2020). https://doi.org/10.2112/SI99-060.1
Received: 10 September 2019; Accepted: 15 December 2019; Published: 14 May 2020
KEYWORDS
CFD
DSAPB
dynamic model
PMM
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