Mathematical Modeling of Operating Modes of Deck Equipment for Fishing Vessels

Ivanovskaya, Aleksandra V.; Zhukov, Vladimir

doi:10.1016/j.trpro.2021.02.053

Cited by 5 publications

(1 citation statement)

References 11 publications

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“…Расчет такой системы сводится к решению дифференциального уравнения второго-четвертого порядка в частных производных, с использованием приближенных [9]- [11] или точных [12]- [14] методов расчета. Данный подход, успешно используемый для расчета колебаний валопровода при изгибах [15], при исследованиях динамики крутильных колебаний широкого распространения не получил.…”

Section: введение (Introduction)unclassified

Propeller Shafting Dynamics Under Impulse Action

Tsarenko

Ulitin

Trudnev

2022

jour

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Propeller shafts and countershafts are bent quite often on sea and river vessels. The cause of the curvature is a strong load on this node of the ship’s power plant. In addition to bending, the shafting experiences longitudinal and transverse loads with a dynamic and static component. A large number of scientific papers have been devoted to the study of the dynamics of the propeller and shafting. However, the problem has not been completely solved, and the increase in damages during the shafting operation and its intensive wear only confirm the relevance of further research in this direction. The aim of the work is to determine the dynamic forces in the shafting, which occur during impulse action due to the propeller impact on the ice. A model of a two-stage elastic rod with inert disks at the ends is presented in the paper. It allows considering different situations of dynamic impact on the shafting and propeller. The following design features such as different stiffness of the shaft sections, different speed of elastic waves of deformation (different densities and modules of elasticity on the shaft sections), reduced inertial load from the moving parts of the drive, can be taken into account in the model. It is concluded that the frequency of the main form of oscillations mainly depends on the inertial loads concentrated at the ends and the shaft rigidity. The proposed simplified model of the inertialess shaft makes it possible to determine the angles of rotation of the shaft sections with sufficient accuracy. For different sections of the stepped shaft, the dynamic torque coefficient can differ significantly.

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Section: введение (Introduction)unclassified

Propeller Shafting Dynamics Under Impulse Action

Tsarenko

Ulitin

Trudnev

2022

jour

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Statistical Analysis of Fishing Vessel Deck Equipment Elements Failures

Ivanovskaya

Klimenko

Popov

2022

jour

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The main breakdowns that may occur during the operation of the deck equipment of a fishing vessel are presented in the paper. These breakdowns can lead to devices failure, serious accidents, which, in turn, entail a decrease in the operational and economic efficiency of the ship’s auxiliary power plant and the ship as a whole. Therefore, in order to improve the maintenance system of deck equipment, it is necessary to improve the methodology for predicting reliability based on structural indicators of elements at the design stage. One of the methods for solving the task is to obtain, accumulate and statistically summarize information on the operational reliability of units, parts and equipment as a whole. For risk analysis during the operation of ship equipment, at the first stage, a classification of hazards based on available data and existing developments of technical means is required. To estimate the average resource and other indicators of the durability of ship mechanisms, it is necessary to know the parameters of the random factors distribution. This will allow, under different laws of parameters distribution, to predict the resource distribution by statistical modeling. The assessment results of the failures of the deck lifting equipment of a fishing vessel are considered in the paper. It is revealed that mooring, anchor and trawl winches, for which operating time data are given, are subject to the greatest failures. The probability of no-failure operation of parts is calculated and its graphical distribution is presented. The results obtained in this work contribute to the further continuation of research in the field of ensuring the required level of performance of elements of deck mechanisms.

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Development trends and modern methods of designing lifting devices for fishing vessels

Ivanovskaya,

Zhukov,

Shustryakov

2024

jour

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The current state of the fishing fleet of the Republic of Crimea is analyzed in the paper. The problems of its insufficiently effective use and low rate of development are shown. The reasons for this are largely the moral deterioration of ships, the main and auxiliary elements of their power plants and the irrational organization of the fleet technical operation system. The analysis makes it possible to identify the reasons for the low competitiveness of special fishing equipment in operation, which plays an important role in the management of aquatic life. The main reasons include the imperfection of calculation and design methods, the incompleteness of the regulatory framework for calculating operational loads, the lack of developed automated control systems and appropriate software that would adequately take into account the specifics of the fishing equipment operation. When creating new lifting equipment for a fishing vessel, it is necessary to apply a systematic design method in order to ensure the required indicators of power, load capacity, speed, energy performance, load stability, operational and environmental safety, as well as economic efficiency. Modern methods of designing machines and mechanisms involve the development of adequate mathematical models that reproduce their states in space and time under the influence of operational loads, taking into account internal and external factors. An algorithm for operational cost analysis using a mathematical model of a lifting device drive system is described in the paper. The design and modernization of fishing equipment using the proposed algorithm will ensure a balance between the operational and cost characteristics of the equipment, which is a prerequisite for the creation of modern competitive marine equipment.

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Mathematical Modeling of Operating Modes of Deck Equipment for Fishing Vessels

Cited by 5 publications

References 11 publications

Propeller Shafting Dynamics Under Impulse Action

Propeller Shafting Dynamics Under Impulse Action

Statistical Analysis of Fishing Vessel Deck Equipment Elements Failures

Development trends and modern methods of designing lifting devices for fishing vessels

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