Affiliation:
1. Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian, China
Abstract
Launching underwater gliders by aircraft could greatly expand the application of underwater gliders. However, during the process of the glider entry into the water, it will be subjected to significant impact loads, especially during the process of wing entry into the water. In this paper, a foldable wing module is proposed to reduce the water entry impact loads of the glider caused by the wings entering into the water. The effect of the foldable wing module on impact loads reduction and the influence of the foldable wing module on the water entry trajectory are studied by numerical method. The results show that the differences in mass and gravity center position caused by the foldable wing module have little effect on the water entry impact loads of the glider until the wings impact the water. When the glider enters the water obliquely, the wing module reduces the peak radial acceleration of the glider. In addition, the trajectory and time of the glider to reach the horizontal attitude are also reduced. These conclusions will be helpful for the designing of the wings of air-launched underwater gliders.
Funder
the Young Elite Scientists Sponsorship Program by CAST
the Fundamental Research Funds for the Central Universities
the National Science Foundation of China
the State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University
the Open Fund of National Center for International Research of Subsea Engineering Technology and Equipment
the Dalian high level Talents Innovation Support Plan
Subject
Mechanical Engineering,Ocean Engineering