Session: 06-15-04 Unsteady Hydrodynamics, Vibrations, Acoustics and Propulsion IV

Paper Number: 127186

127186 - Restoring Time Computation in Self-Righting Process 

The excellent self-righting performance is important to guarantee the normal navigation of Unmanned Surface Vehicles (USV) after overturning, and the restoring time is an important index in design requirements. Traditionally, the static stability method and experiments of full-scale vehicles were used to analyze the large angle stability of the USV. However, when it comes to the analysis of self-righting performance, the traditional static stability method will cause improper integration, and experiments are not convenient. To solve these problems, an improved static stability method is proposed and the whole self-righting process simulation of a physical model is finished. The simulation method is used to predict the self-righting process of an USV on four working conditions. Firstly, a midpoint average method based on the static stability theory is adopted to compute the static restoring time, and the results are compared with the results of the references, which verifies the effectiveness of the midpoint average method. Then, a numerical simulation of a physical model in static water was finished and an experiment of the physical model in a towing tank was conducted. Comparing the restoring time obtained by the midpoint average method, the numerical calculation and the experimental, the results show that the numerical simulation has high accuracy.

Presenting Author: Jinbang Liu Huazhong University of Science and Technology

Presenting Author Biography: Name: Jinbang Liu
Sex:male
Birth: 1997
Research field: Self-righting simulations of USV

Authors:

Jinbang Liu Huazhong University of Science and Technology
Guoxiang Hou Huazhong University of Science and Technology