Experimental and numerical investigation on dynamic characteristics of ship propulsion shafting under uncertainty based on displacement response. (1st October 2021)

• Record Type: Journal Article
• Authors: He, Xiaoliang; Li, Guobin; Xing, Pengfei; Lu, Lixun; Gao, Honglin; Zhang, Hongpeng; Wang, Guoyou
• Is Part Of: Ocean engineering. Volume 237(2021)
• Publication Date: 2021-10-01
• Subjects: Dynamic characteristics -- Ship propulsion shafting -- Uncertainty -- Nonparametric dynamic modeling; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2021.109637
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: The ship propulsion shafting often has a lot of uncertainty due to the impact of dynamic factors during the operation. In order to investigate the dynamic characteristics of the propulsion shafting under uncertainty, the displacement responses were obtained utilizing the experiment and the numerical calculation based on a ship shafting test bench and the established nonparametric dynamic model. The results show that the dynamic characteristics of the propulsion shafting could be significantly affected by the uncertainty. With the increase of uncertainty, the fluctuation of the frequency response function gradually strengthens, the amplitude of the displacement response is enlarged, and the axis trajectory of the propulsion shafting becomes more complex. Therefore, it is essential to consider the uncertainty in the process of the dynamic design and analysis for the ship propulsion shafting. Highlights: Both data uncertainty and model uncertainty can be considered in shafting calculation by non-parametric modeling method. The shafting operation performance is fluctuated under the influence of uncertainty. The dynamic characteristics of the propulsion shafting could be significantly affected by the uncertainty.