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EN
The greatest vibration occurs in the engine room, but all other parts of the ship also experience vibrations because it is propagating. Even though there are methods to reduce these vibrations such as engine beds, they can only reduce the damaging effects and cannot completely eliminate the vibrations themselves. The method used in this research is to compare the measurement of good vibrations in the conditions before the addition of construction and after the addition of construction for later comparison with numerical calculation data. The purpose of this study is to obtain the maximum vibration value in the conditions after the addition of the gorger construction before the addition of the side deck girder construction as a means of evaluating the side deck girder construction planning in the ship engine room ship 2000 DWT. The result consideration of adding construction becomes one or the alternative in providing reinforcement so that it can reduce the vibration that occurs. From analyze results after addition of a sized T profile FB 180 x 8 mm FP 75 x 10 mm, which ranges from 28 - 29 m/s2 for the x-axis vibration value, while for vibrations on the y-axis the maximum is 10-11 m/s2, and on the maximum z-axis. at 20-21 m/s2, this analyze vibration is based on the time between 0 - 15 seconds or per 15 second interval, able to reduce percentage of vibration in the ship engine room area is 34.91%.
EN
With a single approach to modeling elements of different physical nature, the method of Bond Graph (BG) is particularly well suited for modeling energy systems consisting of mechanical, thermal, electrical and hydraulic elements that operate in the power system engine room. The paper refers to the earlier presented [2] new concept of thermal process modeling using the BG method. The authors own suggestions for determining causality in models of thermal processes created by the said concept were given. The analysis of causality makes it possible to demonstrate the model conflicts that prevent the placement of state equations which allows for the direct conduct of simulation experiments. Attention has been drawn to the link between the energy systems models of thermal processes with models of elements of different physical nature. Two examples of determining causality in models of complex energy systems of thermal elements have been presented. The firs relates to the electrical system associated with the process of heat exchange. The second is a model of the mechanical system associated with the thermodynamic process.
PL
W referacie przedstawiono algorytm wyszukiwania statków podobnych o możliwie dużym nasyceniu automatyką przy stosunkowo niedużych jej kosztach. jako zadanie optymalizacji wielokryterialnej. Opracowany algorytm wykorzystuje metodę ważonych zysków na podstawie podobieństwa sumarycznego całego statku jako sumy ważonej podobieństw cząstkowych: ogólnego, napędu głównego, elektrowni oraz poszczególnych instalacji. W tym celu opracowano hierarchiczną strukturę automatyki siłowni okrętowej do projektowania automatyki na podstawie rozwiązań zastosowanych na statkach podobnych w oparciu o informacje zawarte w opisie technicznym i zestawieniu aparatury kontrolno-pomiarowej. System przewidziany jest do wspomagania projektowania i doboru automatyki siłowni, w którym najczęściej wykorzystuje się projekty wcześniej zbudowanych statków podobnych.
EN
The paper presents an algorithm for searching out similar ships with maximal range of automation elements and minimal costs as a multi-criteria optimization task. The proposed algorithm uses the method of weighted profits based on the similarity of the summary of the whole ship as a weighted sum of the partial similarities: general, propulsion, power and individual installations. For this purpose, the hierarchical structure of the ship power plant automation for aided design on the basis of other designs of similar ships from their technical descriptions and specifications of control and measurement points.
EN
The frequent causes of ships’ detentions by port authorities are abnormalities of ship power plant functioning. Each extended ship lay time in port results in a waste of ship operating time thus costs rise to ship owners. This is connected with improper ship power plant management. In order to avoid this, a ship engineer should have at his disposal computer aided system supporting him in the managing of the ship power plant. The prototype of a computer-aided system of operational and maintenance task assignation in ship engine room has been presented in this paper. This system contains three modules that respond of decision-making process for three stages: collecting essential information about operating tasks, selecting of operational and maintenance tasks, generating of the optimal schedule for the set of the determined conditions. For allotment problem was formulated, in the most substantial operating states of a ship like lay time in harbour and sea voyage, the knapsack algorithm’ was applied. The mathematical model uses twocriterions optimization for operational and maintenance task assignation in the ship engine room.
EN
The frequent causes of ships’ detentions by port authorities are abnormalities of ship power plant functioning. Each extended ship lay time in port results in a waste of ship operating time thus costs rise to ship owners. This is connected with improper ship power plant management. In order to avoid this, a ship engineer should have at his disposal computer aided system supporting him in the managing of the ship power plant. The prototype of a computer-aided system of operational and maintenance task assignation in ship engine room has been presented in this paper. This system contains three modules that respond of decision-making process for three stages: collecting essential information about operating tasks, selecting of operational and maintenance tasks, generating of the optimal schedule for the set of the determined conditions. For allotment problem was formulated, in the most substantial operating states of a ship like lay time in harbour and sea voyage, the knapsack algorithm’ was applied. The mathematical model uses twocriterions optimization for operational and maintenance task assignation in the ship engine room.
PL
W pracy przedstawiono metodę hierarchizacji zadań eksploatacyjnych dla celów optymalizacji harmonogramów prac realizowanych w siłowni okrętowej. Na podstawie czynników wpływających na ważność zadań w procesie eksploatacyjnym określono ich strukturę hierarchiczną. Ponadto przeprowadzono wstępne badania ankietowe umożliwiające określenie wartości liczbowych odpowiednich współczynników wpływających na ważność zadań eksploatacyjnych.
EN
This paper deals with the application of the AHP method for hierarchization of operational tasks carrying out in ship engine room. Based on factors influencing importance of the mentioned tasks, we determined their hierarchy structure. Moreover, we acquired opinions of Ship Chief Engineer's concerning their preferences. These opinions allowed to determine values of factors influencing task importance.
PL
W pracy przedstawiono problem planowania zadań eksploatacyjnych w Siłowni Okrętowej z wykorzystaniem teorii pakowania. W podejściu tym maksymalizowane są dwa kryteria: ważności zadań z eksploatacyjnego punktu widzenia oraz najlepszego wykorzystania dostępnego czasu. Określona została postać funkcji celu oraz podstawowe ograniczenia, z jakimi spotyka się starszy mechanik podczas harmonogramowania prac w siłowni okrętowej. Do przeszukiwania przestrzeni rozwiązań zastosowano zmodyfikowaną algorytm przeglądu z nawrotami (Horowitz'a).
EN
The problem of operation tasks scheduling in Engine Room used the theory of packing has been presented in this paper. Two criterions is maximized in this approach: importance of the tasks and the best use of accessible time. The objective function, decision variables and fundamental constraints what meet chief engineer were defined. To searching of solutions space was used the modified Horowitz algorithm.
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