<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The relevance of this study lies in the fact that it presents a mathematical model of the dynamics of the propulsion system of a ship that takes into consideration the mass of water added to it. The influence of this phenomenon on the resonant frequencies of the propeller shaft is examined, and a transfer function for a controllable-pitch propeller is obtained for various operating modes. The purpose of the study is to improve the calculation of the dynamic operating modes of a controllable-pitch propeller by examining the features of a visual models. The VisSim software package is used in the study. A visual model is developed that considers the influence of the rotational speed on the value of the rotational inertia attached to the variable-pitch screw of the mass of water, and a special transfer function is proposed. The study shows that a transfer function of this type has a loop enabling negative feedback. An analysis of the operation of the propeller shaft at its resonant frequency is conducted based on the application of frequency characteristics using the transfer functions obtained. We show that in the low-frequency region, a consideration of the added rotational inertia using the proposed transfer function leads to a significant difference compared to the result obtained with the existing calculation method.</p>
</abstract>

The relevance of this study lies in the fact that it presents a mathematical model of the dynamics of the propulsion system of a ship that takes into consideration the mass of water added to it. The influence of this phenomenon on the resonant frequencies of the propeller shaft is examined, and a transfer function for a controllable-pitch propeller is obtained for various operating modes. The purpose of the study is to improve the calculation of the dynamic operating modes of a controllable-pitch propeller by examining the features of a visual models. The VisSim software package is used in the study. A visual model is developed that considers the influence of the rotational speed on the value of the rotational inertia attached to the variable-pitch screw of the mass of water, and a special transfer function is proposed. The study shows that a transfer function of this type has a loop enabling negative feedback. An analysis of the operation of the propeller shaft at its resonant frequency is conducted based on the application of frequency characteristics using the transfer functions obtained. We show that in the low-frequency region, a consideration of the added rotational inertia using the proposed transfer function leads to a significant difference compared to the result obtained with the existing calculation method.

Transfer Function for a Controllable Pitch Propeller with Added Water Mass

Department of Ship Power Plants and Systems

Danube Institute of the National University „Odessa Maritime Academy”

Polish Maritime Research

This work is licensed under the Creative Commons Attribution 4.0 International License.

{"article-title":"Transfer Function for a Controllable Pitch Propeller with Added Water Mass"}

The relevance of this study lies in the fact that it presents a mathematical model of the dynamics of the propulsion system of a ship that takes into...

Transfer Function for a Controllable Pitch Propeller with Added Water Mass

Publié en ligne: 11 déc. 2023

Pages: 74 - 80

DOI: https://doi.org/10.2478/pomr-2023-0060

Mots clés
propulsion system, torsional vibrations, shaft line, added water mass, transfer function, propeller screw

© 2023 Volodimir Leshchev et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Transfer Function for a Controllable Pitch Propeller with Added Water Mass

Publié en ligne: 11 déc. 2023

Pages: 74 - 80

DOI: https://doi.org/10.2478/pomr-2023-0060

Mots cléspropulsion system, torsional vibrations, shaft line, added water mass, transfer function, propeller screw

© 2023 Volodimir Leshchev et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Mots clés
propulsion system, torsional vibrations, shaft line, added water mass, transfer function, propeller screw