Minimizing lifetime structural costs: Optimizing for production and maintenance under service life uncertainty |
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| Institution: | 1. Department of Mechanical and Aerospace Engineering, University of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow, G1 1XJ, UK;2. Department of Industrial Engineering, University of Naples “Federico II”, Via Claudio 21, 80125 Naples, Italy;3. Institute of Combustion Research, National Council of Research, Via Claudio 21, Naples, Italy;1. Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Department of Mechanical and Industrial Engineering, Campus de Caparica, 2829-516 Monte de Caparica, Portugal;2. UNIDEMI, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Department of Mechanical and Industrial Engineering, Campus de Caparica, 2829-516 Monte de Caparica, Portugal;3. Direção de Navios, Base Naval de Lisboa, Alfeite, 2810-001 Almada, Portugal |
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| Abstract: | Current naval shipowners are being forced to extend the service lives of their aging vessels from budgetary and political constraints. This is causing them to incur significant costs due to maintaining the structure of these older ships to keep the ships in operation. These increasing costs make it desirable to design new naval structures with their minimization in mind, as well as ensuring that such vessels are robust to changes in expected service life with respect to their total lifetime cost. However, such structures will necessarily have higher production costs, therefore, an optimization framework is presented to estimate both production and maintenance costs for a naval vessel's internal structure and develop trade-spaces between these two competing objectives in order to find designs that represent a balance of both. |
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| Keywords: | Lifetime cost Maintenance Structural optimization Production Naval design |
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