原文传递
National Shipbuilding Research Program, 1990 Ship Production Symposium, Paper No. 1A-1: Standardization in Ship Structural Design.
| 题名： | National Shipbuilding Research Program, 1990 Ship Production Symposium, Paper No. 1A-1: Standardization in Ship Structural Design. |
| 作者： | kriezis, g. a. |
| 关键词： | mathematical models, algorithms, methodology, thickness, ships, models, structural properties, materials, steel, variables, costs, nonlinear systems, solutions(general), construction, cost models, weight, classification, ship structural components, differ |
| 摘要： | This paper presents two methodologies for the automatic structural design of the midship section of a ship based on the American Bureau of Shipping (ABS) classification rules. The first methodology has as an objective the minimization of the steel required to build the structure of the ship and is based on the solution of a nonlinear minimization problem subject to bounds on the variables, linear and non-linear constraints. The second methodology uses a heuristic algorithm based on the use of standard structural shapes to reduce the material cost required for the construction of the ship, while at the same time avoiding a significant penalty in the increase of the structural weight of the ship. Cost data from an actual steel mill are obtained and alternative structural designs for two oil carriers are evaluated according to their material cost and weight differentials. A net present value cost model is then developed to assess the cost advantages of standardization in structural design. structural properties of the ship structure (plate thickness, stiffener spacing and size) is also varied to assess the effects of using fewer structural shape variations to design the structure of the ship. The American Bureau of Shipping Rules for Building and Classifying Vessels (ABS Rules) are used as a basis for the design of a structurally acceptable ship midship section. A more detailed presentation of the material in this paper can be found in Kriezis 90. Structural Design Model It is standard practice among ship designers to design the structure of a ship using classification rules to select the scantlings of the hull structural members. This approach is used also in this work to provide a common framework to compare the two methodologies of minimum weight and minimum cost structural design. |
| 总页数： | u0706；16p |
| 报告类型： | 科技报告 |
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