Naslov
Measurement of Torsional Vibrations on Propeller Shafts Using Code Discs and Optical Forks

Autori
Vukičević, Miroslav ; Cvrk, Sead ; Kovač, Draško ; Lalić, Branko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
8th IMSC2019, April 11th – 12th, 2019, Budva, Montenegro, Book of Proceedings / - , 2019, 345-351

Skup
8th IMSC2019, April 11th – 12th, 2019, Budva, Montenegro

Mjesto i datum
Budva, Crna Gora, 11.04.2019. - 12.04.2019

Vrsta sudjelovanja
Ostalo

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
propeller shaft, torsional vibration, code discs, optcal forks, critical angular velocity

Sažetak
This paper presents a method for measuring torsional vibrations on ship propeller shats using code discs and opcal forks. This method is particularly suitable for measuring torsional vibrations on shafs carrying rotating masses such as propeller on propeller shafts. With such shafts the gyroscopic effect is particularly emphasized due to the large mass of the propeller. At certain angular velocities on propeller shafs, the gusts increase significantly, and side vibrations can reach a resonant character (like with main engine where we must pass over the critical speed quickly). The angular velocity of the propeller shaft at which the described phenomena are formed, is called the critical angular velocity. From the viewpoint of the safety and functionality of the propeller shafts, it is very important to determine critical speeds as well as other values relevant to the behaviour of the shafts, such as amplitudes and phasal movements in the critical angular velocity. This problem is particularly emphasized in the propeller shafs driven by high-speed marine engines. By measurement of torsional oscillations on propeller shafts during the ship testing we can determine the ranges of critical angular velocities.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Tehnologija prometa i transport

POVEZANOST RADA