Modelling of container service at port terminals

U radu je razmatran proces transporta i pretovara kontejnera dopremljenih drumskim teretnim vozilima u lučki kontejnerski terminal. Ulazno - izlazna kapija, inspekcijsko mesto i skladišna dizalica mogu se posmatrati kao kanali sistema masovnog opsluživanja (SMO) koji redom opslužuju kontejnere. U analizi se primenjuje redna veza SMO. Cilj primene ovakve veze je određivanje intenziteta opsluživanja u pojedinačnim sistemima da bi se smanjilo vreme čekanja kontejnera unutar lučkog terminala i posledično vreme obrta drumskih teretnih vozila koja dopremaju izvozne kontejnere. Opisan je simulacioni model redne veze SMO pod određenim pretpostavkama o raspodelama verovatnoća vremena opsluživanja. Rezultati pokazuju da se ovakva veza SMO može uspešno koristiti za modeliranje opsluživanja kontejnera.A serial system for handling export containers at a port terminal is considered in this paper. The steps that a container must follow in passing through the various port control points are: an entry gate where some paperwork is done, another control point such as weighting/inspection station, and a bridge-type yard crane that lifts containers onto a storage area. An entry gate, weighting/inspection station and a yard crane can be considered as service channels of queuing systems that operate in series. The goal of implementation of serial queuing systems is to determine the intensity of service in an individual queuing system to reduce the waiting time of containers inside the port terminal, as well as the turnaround time of road freight vehicles that deliver export containers. Under the specified assumptions related to probability distributions for service time, the simulation model of a serial system of queuing systems is developed. It has been shown that modeling of container service at port terminals can be carried out successfully by applying serial queuing systems