Suvremeni pristup ispitivanju dinamičkih karakteristika elemenata ili sustava nekog uređaja omogućava sistemska dinamika. Sistemska dinamika izvanredno je softwarsko sredstvo za proučavanje dinamike ponašanja prirodnih, tehničkih i društvenih realiteta, to jest sustava različite prirode i obilježja među kojima postoji relativno visok stupanj analogije. Metodologija njezina rada, uključujući i uporabu digitalnih kompjutora, u dosadašnjoj se praksi pokazala kao učinkovito sredstvo za rješavanje problematike: upravljanja, ponašanja, osjetljivosti, fleksibilnosti i proučavanja dinamike ponašanja sustava koji imaju visok stupanj složenosti, i to kompjutorskim simuliranjem, dakle “laboratorijski”, što znači bez opasnosti za promatrane realitete. Za uporabu sustavne dinamike u rješavanju složenih problema potrebna su kompleksna znanja iz više znanstvenih disciplina, ali i dobro poznavanje prirode samog problema koji se analizira.
U članku se razmatraju dinamičke karakteristike rashladnog sustava u brodskim dizelskim motorima (BDM) uz pomoć sistemske dinamike.
Sustav hlađenja porivnih BDM-a je složen sustav na koji djeluju raznovrsni poremećaji, i oni zbog svojega promjenljivog djelovanja rezultiraju promjenom radne temperature BDM-a. Sustav dinamičkog pristupa u analizi rada BDM-a omogućava dobivanje odgovora na pitanje “što ako se dogodi…”; drugim riječima, saznaje se kakva će biti reakcija na promjenu bilo koje varijable u sustavu hlađenja.
Dan je kratak osvrt na dinamički i statički režim rada, matematički model sustava hlađenja BDM-a, simulacijski model u POWERSIM programskom jeziku, te dijagrami tokova.The modern approach of the exploration of dynamic characteristic of elements or system of some device has been enabled by system dynamics. System dynamics is an excellent software system for studying the dynamic of the behaviour of natural, technical and societal realities i.e. system of various natures and features in which there exist relatively high analogy rate. The methodology of its work, including even the use of digital computers has shown to be an efficient mean for solving the problems: management, behaviour, sensitivity, flexibility and studying of dynamics of the behaviour of the systems of high complexity by computer simulation, in laboratory what means without danger for the realities observed. For the usage of system dynamics in the solution of complex problems, various complex knowledge from various scientific disciplines are required, but good knowledge of the nature of the problem itself, which is being analyzed. The paper has analyzed dynamic characteristic of cooling system in marine diesel engines by means of system dynamics.
The cooling system of propulsion of MDE is a complex system onto which various disorders act and due to their changeable act result into the changes of working temperature of MDE. System dynamic approach in the analysis of MDE enable us to obtain the answer to the question “What if...” in other words we arrive at the solution what the reaction would be at the changes of any variable in the cooling system.
The paper has shown: dynamic and static regime of work, mathematic model of the cooling system of MDE, simulation model in POWERSIM programme language and diagrams of the flows of water
