适应共同结构规范的30．8万t VLCC船型开发

708研究所以“经济、安全、环保”（ESE）为宗旨，开发了适应双壳油船共同结构规范（CSR）的30．8万t VLCC船型。文中介绍了CSR对结构设计的关键要求以及对总体设计的部分要求，并着重对VLCC总强度储备、中剖面设计和粗网格有限元分析等关键技术进行了分析，以期初步阐明CSR对VLCC结构设计的影响。     

Rule-based optimization of midship structures

A rule-based overall design methodology for midship structures of small inland waterways vessels is presented. It is shown how the designer, under conflicting requirements, can select the optimum design by using a combined objective function with priority factors assigned to individual design criteria. The concept of optimization, in large-scale structural design problems, is extended to the local members (the stiffening elements) of the ship structure, so that the stiffeners can be specified by their actual dimensions instead of section moduli. The effects of price-structure (labour rate to material price ratio) and the choice of type of stiffener on design are investigated. Standard sections and optimized fabricated sections are taken as the alternative options for selecting the stiffeners. Conversion of exact mathematical optimum solutions into production-oriented designs is also demonstrated in a series of practical applications of the proposed method.