首页> 外文会议>International Conference on Offshore Mechanics and Arctic Engineering 2007(OMAE2007) vol.2; 20070610-15; San Deigo,CA(US) >A DISCUSSION OF LONG TERM RESPONSE VERSUS MEAN MAXIMUM RESPONSE OF THE SELECTED DESIGN SEA STATE
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A DISCUSSION OF LONG TERM RESPONSE VERSUS MEAN MAXIMUM RESPONSE OF THE SELECTED DESIGN SEA STATE

机译:选择的设计海状态的长期响应与平均最大响应的讨论

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The overall aim of the design process is to ensure that a structure can withstand with sufficient margin all foreseen load events. Offshore rules and regulations will typically define a set of rules to be followed by the designer. By fulfilling these it is tacitly assumed that the aimed safety level is achieved. The governing regulations and rules and, not the least, their interpretation may vary between various offshore regions. This may be the case both for the load side of the problem and the strength side of the problem. In connection with design of offshore structures, the largest variability and uncertainty is typically associated with the load side of the problem. The purpose of this paper is to discuss the consequences of two rather common definitions regarding the characteristic environmental load to be used for design purposes: I) The characteristic response is taken as the load for which the annual probability of exceeding it is q (here referred to as the q-probability load), ii) The characteristic response is taken as the mean extreme response of a sea state for which the annual probability of exceeding it is q (q-probability sea state). Results are shown for some generic response cases varying from a linear response case being rather insensitive to wave period to a quadratic response problem associated with a critical wave period band.
机译:设计过程的总体目标是确保结构能够以足够的余量承受所有预见的载荷事件。离岸规则和条例通常将定义设计师要遵循的一组规则。通过实现这些目标,默认假定达到了目标安全级别。在各个离岸地区之间,适用的规章制度和规则,尤其是其解释,可能会有所不同。对于问题的负载侧和问题的强度侧都可能是这种情况。与海上结构的设计有关,最大的可变性和不确定性通常与问题的负荷方面有关。本文的目的是讨论关于用于设计目的的特征环境负荷的两个相当普遍的定义的结果:I)特征响应被视为每年超过该概率的概率为q的负荷(此处称为ii)将特征响应视为某海状态的平均极端响应,对于该海状态,每年超过该概率的概率为q(q概率海状态)。给出了一些一般响应情况的结果,从线性响应情况对波浪周期不敏感到与临界波浪周期带相关的二次响应问题有所不同。

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