Narrow your search

Library

ULiège (2)


Resource type

dissertation (2)


Language

English (2)


Year
From To Submit

2013 (1)

2012 (1)

Listing 1 - 2 of 2
Sort by

Dissertation
Modeling and Simulation of a Production Line (Panel Line) in shipbuilding Industry using Tecnomatix Plant Simulation 9.0
Authors: --- --- ---
Year: 2012 Publisher: Liège Université de Liège (ULiège)

Loading...
Export citation

Choose an application

Bookmark

Abstract

Shipbuilding industry is one of the most difficult operations as far as design and production are concerned, since it is production processes where hundreds of thousands of parts are welded and joined together to only just give a single product (Ship). The technical complexity of the ship industry is highly related to the fact that different types of ships entail distinct specification requirements that affects the design and production system adversely. The construction of the ship is really a special challenge since it should in principle satisfy the requirements of the ship owner, shipyard and the Class and Flag Society which usually presents a conflict interest. 
The purpose of this thesis is to examine the production line (Panel line) in shipbuilding industry through the application of modeling and simulation techniques using Tecnomatix Plant Simulation 9.0 software considering two types of ships (Tanker and Container) for which most of the stiffened panels are produced in the Panel line. During modeling, first the existing condition has been modeled and simulated considering the parameters for each work station (station time) in order to get an insight about the production rate, the effect of each work station on the overall panel line and their utilization. Next, Scenario analysis has been performed in effort to improve the production rate along the panel line applying the experimental manager and the genetic algorithm tools within the software by selecting appropriate optimization parameters from the work stations so as to improve the productivity. Furthermore the influence of the addition of a new workstation on the existing panel line has also been examined in both cases (Tanker and Container ship) that would be very useful input for the new workstation to be incorporated soon that leads to the design of a new work station. 
The simulation analysis carried out in this project revealed that the same work station is acting as a bottleneck which is affecting the productivity of the panel line both for container and tanker ships considered in the analysis. Different improving alternatives have been presented in the paper and a new work station has been designed in such a way that it will not at least affect the productivity of the existing production (panel) line considering sub-station within the new work station. Finally, In order to give more flexibility to the modeling and simulation process, an interface has been established with the Microsoft access (database) where the data for the workstations’ parameters will be stored and to Microsoft excel where the final results will be exported that facilitates the use and visualization of the results. The Microsoft access and Microsoft excel files have been placed on the same interface (Model frame) in order to easily access the files at the same time. Based on the overall analysis carried out in this thesis, a conclusion has been drawn.


Dissertation
Introduction To Restructuring Of Mid-Tier Shipyard By Developing Rough Layout Concep
Authors: --- --- ---
Year: 2013 Publisher: Liège Université de Liège (ULiège)

Loading...
Export citation

Choose an application

Bookmark

Abstract

The irregular demand in ship types, besides, limited timeframe to deliver either navy or commercial ships play a great role in shipbuilding industry. Therefore, shipyards are trying to reduce delivery times also reducing production cost. The main goal of this master thesis is to develop proposals for restructuring workflow of mid-tier shipyard using methodology that [WAN 10-2] proposed, rough layout concept and discrete-event-simulation (DES). 

In order to accomplish with this goal, brief explanation about ship production process is given, description of simulation used in this field. Besides, brief analysis of capacities in diverse software and capacities of the shipyard used as case of studies. 

As introduction of this type of study, using as case of study a navy ship called Offshore Patrol Vessel – OPV80. The first existing condition was modeled and validated considering averages values for workstations. In order to get better understanding of production rate, assessing effect of each workstation on overall production process is done. 

Following, using this existing and validated model was possible creation of various scenarios. Two scenarios were performed in endeavor to improve productions time. One of this scenarios deal with the inclusion of automation in production line and the other deal with layout of the workflow proposed to reduce the time used to move the material along the production line. 

In this master thesis simulation analysis had shown how to evaluate either risk or impact of future investments or changes in production line, varying parameters and measure outputs. Furthermore, considering the influence of each parameter in the production line and bottleneck assessment.

Listing 1 - 2 of 2
Sort by