ON THE VIBRATIONS OF MULTI-CYLINDER MARINE DIESEL GENERATORS

Authors

  • Yuliyan Minchev Department of Mechatronics Naval Academy N. Vaptsarov Varna, Bulgaria
  • Ivaylo Minchev Department of Mechatronics Naval Academy N. Vaptsarov Varna, Bulgaria

DOI:

https://doi.org/10.68302/std2026.vol2.62

Keywords:

diesel generators, natural frequencies, oscillation

Abstract

In modern ship power plants with electric propulsion motors, the main ship power system consists of powerful multi-cylinder diesel generators. The engine and the generator are mounted on a common frame, which is attached to the ship's hull through resilient (elastic) elements.

Minimizing the vibrations induced in the ship's hull is achieved by refining the mechano-mathematical models. In the present work, this is performed using a mechano-mathematical model in which the diesel-generator-frame system is modeled as an elastic body with distributed parameters.

A model has been developed in which the ship's power plant undergoes vibrations in a single plane. The resulting system of differential equations describes the forced vibrations of the proposed dynamic model.

The natural frequencies of free vibrations have been obtained. Forced vibrations excited by the imbalance of the generator rotor are investigated.

Results from experimental studies of a nine-cylinder diesel generator are presented.

The presented theoretical and experimental results demonstrate the necessity of accounting for bending vibrations when investigating the overall vibrations of resiliently mounted multi-cylinder diesel generators.

Supporting Agencies

This report/article was financed by the Ministry of Education and Science under the National Science Program "Security and Defense", carried out in implementation of the National Strategy for the Development of Scientific Research 2017-2030 and adopted by Decision of the Council of Ministers No. 731 of October 21, 2021. The material reflects only the author's opinion and the Ministry of Education and Science is not responsible for the content.

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References

[1] Minchev N.D. Dynamics of ship machinery. Military Publishing House Sofia 1983, 448 p.

[2] Minchev N.D., Draganchev Hr. Strength and vibrations of ship machinery. Galaktika Publishing House, 1992, 390 p.

[3] Minchev N.D., Zhivkov V., Stoyanov P., Alipiev O. Theory of mechanisms and machines. Softtrade Publishing House, Sofia 2011, 596 p.K. Elissa, “Title of paper if known,” unpublished.

[4] Minchev N.N. Influence of the elastic deformation of the machine body on the vibration state. Journal Mechanics of Machines ISSN 0861-9727, No. 31, 2000, pp. 3-6.

[5] Minchev N.N. Influence of the elasticity of the foundation on the vibration state of machines. Journal of Machine Mechanics N31, 2000, pp. 7-13, ISSN 0861-9727.

[6] Minchev N.D., Minchev N.N. Influence of the elasticity of the machine body on the vibration state. Journal of Machine Mechanics N22, 1998, pp. 7-10, ISSN 0861-9727.

[7] Minchev N.N. Research on problems of elastodynamics of machine units with an elastic body. Dissertation - 2000, SNS MTT.

[8] Minchev N.D., Minchev N.N. A peculiarity in vibration diagnostics of machines with an elastic body. Journal of Machine Mechanics N 33, 2001, pp. 3-7, ISSN 0861-9727

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Published

17.09.2026

Issue

Vol. 2 (2026): Proceedings of the International Conference on Secure Systems Design and Technology Development.

Section

ENGINEERING SCIENCES AND PRODUCTION TECHNOLOGY

License

Copyright (c) 2026 Yuliyan Minchev, Ivaylo Minchev

Creative Commons License

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

How to Cite

[1]
Y. Minchev and I. Minchev, “ON THE VIBRATIONS OF MULTI-CYLINDER MARINE DIESEL GENERATORS”, SysTechDev, vol. 2, pp. 197–202, Sep. 2026, doi: 10.68302/std2026.vol2.62.