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首页> 外文会议>International Shipbuilding Conference(ISC'2002) Section C; 20021008-20021010; St.Petersburg; RU >PRACTICAL APPLICATION OF LIMIT STATE AND RELIABILITY PHILOSOPHY FOR WORK DECKS
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PRACTICAL APPLICATION OF LIMIT STATE AND RELIABILITY PHILOSOPHY FOR WORK DECKS

机译：极限状态和可靠性理论在工作甲板上的实际应用

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摘要

Traditionally decks of work vessels such (semi-submersible) crane vessels and pipe layers as used in the offshore industry are designed based upon the use of allowable stresses being a percentage of the yield strength of the steel. To this end global stresses from sea action and local stresses from pay load and crane lifting loads are superposed resulting in heavy scantlings. For the modification of an existing work vessel modern philosophies based upon limit state considerations and reliability of the structure were used instead of the design stress approach. This was done in view of the operational characteristics of the vessel up till the present day. The new approach resulted in a somewhat higher pay load for the vessel. More important was the significant reduction in modification and upgrading costs and shortening of the time needed for the actual modification. At the same time a better insight in the reliability and behaviour of the structure guaranteed the safety of the vessel as confirmed by the classification society. The presentation will show how the approach of reliability and limit state philosophies can he used in practical applications and how significant benefits can be found with respect to weight of structure, payload, newbuilding or modification cost and fabrication duration.
机译：传统上，在海上工业中使用的工作船甲板（（半潜式）起重机船和管道层）是基于允许应力的使用而设计的，该允许应力是钢的屈服强度的百分比。为此，来自海上活动的全球应力与来自有效载荷和起重机起重载荷的局部应力叠加在一起，导致沉重的尺寸。为了修改现有的工作船，使用了基于极限状态考虑和结构可靠性的现代理念，而不是设计应力方法。考虑到直到今天该船的运行特性，才进行此操作。新方法导致了该船的更高的有效载荷。更重要的是大大减少了修改和升级成本，并缩短了实际修改所需的时间。同时，如船级社所证实的那样，对结构可靠性和性能的更好了解确保了船舶的安全性。该演讲将展示如何在实际应用中使用可靠性和极限状态哲学的方法，以及如何在结构的重量，有效载荷，新建或改建成本以及制造时间方面发现重大收益。

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