Automation System Vibration Analysis Taking Environmental Factors into Consideration

Tian Zhe, Cong Zhang, Xinping Yan, Yeping Xiong

Abstract


This paper aims to investigate the vibration behavior of a propulsion system subjected to hull deformations ina two dimension circumstance. As known that large scale ships have great developments in recent years which could cause much severer conditions among the interaction between the propulsion system and ship hull. Excited forces from thesea waves could make the ship hull deformed which further cause drastic vibrations of the shaft system. As a result, the malfunctions of shaft propulsion system are potential existed as the vibrations of the shaft always exceed its maximum allowable values.This paper establishes a simplified model of the large ship propulsion-hull system to analyze the vibration behavior of the ship propulsion system subjected to the ship hull deformations. The hull deformations were obtained as the excited forces under different sea conditions. Then base on the simplified 2D model, the effects of propeller, supports stiffness, the location of hull excitations, the amplitude of excitations are discussed. 


Keywords


hull deformations; propulsion; vibration behavior; variable parameter

Full Text:

PDF

References


Yan XP, Li ZX, Liu ZL,Yang P, Zhu HH, Yang ZM. Study OnCoupling Dynamical Theory for Interaction of Propulsion System and Hull of Large Ships: a Review. Journal of Ship Mechanics.2013; 17(4): 439-449.

Editorial of MER. An Aligned View on Shafts.MER-Marine Engineers Review. 2006; 105(5):44-47.

Dong HJ, Zhang JJ. Study on the Hull Deflection for the Effect of Shafting Alignment. Ship Engineering. 2009; 1: 8-11.

Murawski L. Shaft Line Alignment Analysis Taking Ship Construction Flexibility and Deformations into Consideration. Marine Structures.2005;18: 62–84.

Xing JT, Price WG. Mixed Finite Element Substructure-subdomain Methods for the Dynamical Analysis of Coupled Fluid-solid Interaction Problems. Phil. Trans. R. S. Lond. 1996; 354(5): 259-295.

Figureari M, AltosoleM. Dynamic Behaviour and Stability of Marine Propulsion

Systems[J]. Proceedings of the Institution of Mechanical Engineers, Part M. 2007; 221(1): 187-209.