Propulsion Performance Analysis of Wave-powered Boats

  • Zong-Yu Chang College of Engineering, Ocean University of China, Qingdao, China ; Key Lab of Ocean Engineering of Shandong Province, Qingdao, China
  • Chao Deng College of Engineering, Ocean University of China, Qingdao, China
  • Jia-Kun Zhang College of Engineering, Ocean University of China, Qingdao, China
  • Zhan-Xia Feng College of Engineering, Ocean University of China, Qingdao, China
  • Zhong-Qiang Zheng College of Engineering, Ocean University of China, Qingdao, China ; Key Lab of Ocean Engineering of Shandong Province, Qingdao, China
Keywords: wave-powered boat, dynamics analysis, ADAMS

Abstract

With the development of oceanographic research and marine environment protection, mobile marine platforms are applied for ocean observation for a long journey. Wave-powered boats are capable of applying wave motion to propel itself and make a long-duration survey. This paper presents the dynamics of the wave-powered boat under the excitation of the heave motion and pitch motion. Taking the wave-powered boat with double fins as an example, the heave and pitch motions of the boat are obtained by ANSYS-AQWA firstly. Then the relationship between propulsion performance and three factors, including  wave height, wave period, and restoring stiffness of torsion spring, was analyzed through multibody dynamics software ADAMS. With the increase of sea state from level 1 to level 4 the average propulsion speed increased from 0.4m/s to 1.4m/s. Under the same wave height and period, with the increase of restoring stiffness of torsion spring from 0.0125N·m/deg to 0.3N·m /deg, the propulsion speed of the wave-powered boat increases first and then decreases, and there exists an optimum stiffness. Through the calculation it is found that when the restoring stiffness of torsional spring is increased from 0.025N·m /deg to 0.2N·m /deg with the sea state level 1 to 4, the wave powered boat has better propulsion performance.

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Published
2020-04-01
How to Cite
Zong-Yu Chang, Chao Deng, Jia-Kun Zhang, Zhan-Xia Feng, & Zhong-Qiang Zheng. (2020). Propulsion Performance Analysis of Wave-powered Boats. International Journal of Engineering and Technology Innovation, 10(2), 121-129. Retrieved from http://ojs.imeti.org/index.php/IJETI/article/view/4276
Section
Articles