Study on Calculation Method of Torsional Vibration of Propulsion Shafting under Ice Torque Excitation Based on Frequency Domain Analysis and Development of Engineering Software
Polar / ice route will become a new channel connecting the Pacific and the Atlantic in the foreseeable time because of the impact of global warming. For research on polar/ice navigation technology, calculation of torsional vibration of propulsion shafting under ice torque excitation is a key factor in the design of shafting. In this article analysis of ice torque excitation on propeller blades is carried out with Fourier transform method. A method of converting the calculation of excitation on the rotating propeller into the calculation in an equivalent system having same rotating speed as the diesel engine is presented. Engineering software is developed to calculate torsional vibration of the propulsion shafting excited by ice torque. This study may build a good foundation for China independent research and design of polar/ice navigation marine propulsion shafting.