Dissertações em Engenharia Naval (Mestrado) - PPGENAV/ITEC

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/10055

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Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Análise de alternativas intermodais para escoar a produção de soja dos Estados do Pará e Tocantins
(Universidade Federal do Pará, 2021-08-31) OLIVEIRA, Vitor Hugo Pereira de; ROCHA, Marcus Pinto da Costa da; http://lattes.cnpq.br/7169569605967930; TOBIAS, Maisa Sales Gama; http://lattes.cnpq.br/9635266655242384
World projections indicate an increase in demand for soy and, in this context, countries with continental dimensions and favorable soils such as Brazil stand out. Particularly, the states of the northern region of Brazil show themselves as possible new agricultural frontiers for this crop. However, they need to be competitive in order to sell their production, which indicates the need for studies of available modal alternatives to determine those with better economic results. With this in mind, the present work executed the analysis of alternative intermodal routes using linear programming, to identify the optimal solution route, in support to decision-making in the transport of soybeans for export, taking as a case a region located between States of Pará and Tocantins, close to the Araguaia-Tocantins waterway. Within the categories of linear programming models, the particular case called transport and transshipment problem was used. The model aimed to minimize transport costs from the production centers to the exporting port, through the current infrastructure and, under different scenarios of intermodal alternatives formed by the project of Ferrovia Paraense S.A. and by Araguaia-Tocantins waterway, the year 2019 and production projections are considered for the year 2029. The results showed that the scenarios with waterway transport bring greater benefit to the region, achieving savings of up to 23%. Furthermore, the Vila do Conde port complex expands its zone of influence, thus obtaining increase in the quantity exported in up to 1059.7%. As well, it confirms that the State of Pará is the one that most needs an intermodal alternative. Furthermore, the routes were configured in new transport networks, reducing the distances traveled in the road modal to transport production from the municipalities, reducing the flow on the main highways. Thus, it is concluded that intermodal transport improves regional competitiveness and favors the development of States.
Acesso aberto (Open Access)
Avaliação do desempenho portuário do porto de Santana no contexto do projeto arco norte através da análise hierárquica de processo - AHP
(Universidade Federal do Pará, 2024-12-07) SILVA, Álisson Sousa da; TOBIAS, Maisa Sales Gama; http://lattes.cnpq.br/9635266655242384; https://orcid.org/0000-0002-0888-0685
Brazil has significant agricultural production, the flow of which represents a logistical and operational challenge due to restrictions and limitations of transport infrastructure. The assessment of port performance is an issue to be observed, in particular, in the North region, with enormous hydrographic potential for navigation and economic importance, and proposals for logistical solutions for the more efficient flow of agricultural production. Special emphasis is placed on agricultural production coming from the Center-West, with grain transport routes leaving this region, partly to the states of Pará and Amapá and, via the Madeira River Waterway, through the State of Amazonas. From this perspective, the Arco Norte project emerged at the beginning of the 2010s, proposing the formation of an intermodal network, taking advantage of existing transport infrastructures and also new investments, based on production estimates for grain exports from the State of Mato Grosso in particular, soy. Among the ports considered, the Port of Santana - AP stands out for its proximity to the sea and soybean destinations, available area for expansion and low current occupancy rate. In view of the above, this work presents research of a documentary and data nature, with the objective of evaluating the criteria that influence the performance of the Port of Santana within the scope of the Arco Norte project, promoting a hierarchical process analysis of its priorities in the composition of the efficient intermodal regional transport network at the port, in light of demand expectations and future expectations. To this end, the methodology was based on a bibliographical review of studies on Arco Norte and, also, on-site visits to port stakeholders, to select the criteria for the Port of Santana. With the criteria in hand, a questionnaire was applied to support the application of the Hierarchical Process Analysis (AHP) method, involving stakeholders linked to the port, for the hierarchization as a response to the evaluation criteria of the Port of Santana and its critical aspects. In the results obtained from this dissertation, there is a prior selection of criteria, based on existing literature and empirically validated with stakeholders. Also, the proposition and use of an instrument (questionnaire) to identify and classify port assessment criteria, using the AHP method. At the end of the dissertation, the order of priority of the criteria and alternatives and the relationship between them were established, as well as a recommendation for the investments necessary to accredit the Port of Santana in the Arco Norte project, highlighting the pressing need to expand the pier to enable the attraction of long-haul vessels. Furthermore, improving land access, together with the opening of new expansion areas, is a priority for improving operations. The administrative integration of institutions in the port system also stood out as a strategic element. In this context, the alternatives highlighted, such as the optimization of port movement, investment in dredging and the introduction of technology, emerged as fundamental responses to meeting defined demands, promoting efficiency, competitiveness and preparation for future challenges.
Acesso aberto (Open Access)
Programação Linear aplicada no Transporte Aquaviário de passageiros sob restrições de demanda e nível de serviço para as travessias Belém-Camará, Belém-Arapari e Belém-Cotijuba
(Universidade Federal do Pará, 2022-12-22) ALENCAR, Elisangela da Silva dos Santos de; ROCHA, Marcus Pinto da Costa da; http://lattes.cnpq.br/7169569605967930; https://orcid.org/0000-0002-1849-1982; TOBIAS, Maisa Sales Gama; http://lattes.cnpq.br/9635266655242384; https://orcid.org/0000-0002-0888-0685
In the Amazon region, hydrological transportation has historically played a crucial role. However, passenger water transportation lacks economic models that assist in the design and implementation of strategies for its viability. In this study, a cost model for passenger water transportation was developed based on activity-based costing principles and linear programming. The aim was to optimize costs and maximize profits, considering demand and service level constraints in a water transportation company in the city of Belém, Brazil. The model was applied to three crossings that operate passenger, cargo, and vehicle trips between Belém and Ilha de Marajó. Various simulations were conducted to explore opportunities and conditions for reducing operational costs. The objective was to find the best cost-profit relationship, with the model parameters including variable costs, profits, and the maximum number of possible trips. Based on the results, alternative cost reduction strategies were established to achieve maximum profit and the highest number of trips. The model proved to be useful through the analysis of viable and effective cost reduction strategies

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