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首页> 外文会议>Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments >Experimental and Numerical Investigation into Fatigue and Fracture Assessment of Structures in the Challenging Environments of Deep Oceans
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Experimental and Numerical Investigation into Fatigue and Fracture Assessment of Structures in the Challenging Environments of Deep Oceans

机译：深海环境中结构疲劳和断裂评估的实验和数值研究

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Estimating the fatigue life of structures in challenging environment is an important factor for both design and maintenance of the asset. Much research has been completed to provide a better estimate of fatigue life of the structure under such extreme loading conditions. However, the uncertainties in the behavior of both the material and the structure have made impractical to provide a real estimate of the fatigue life of the asset. Using extensive field experiments in the Gulf of Mexico, this paper studies the fatigue assessment of structures under deep ocean current profiles. The real VAL stress-time history is used to study the fatigue life of the structure against those calculated based on various numerical fatigue models. It is illustrated that the application of simplified fatigue models that are based on CAL scenarios is nonconservative and has resulted in implementation of high safety factors in the industry.
机译：在充满挑战的环境中估算结构的疲劳寿命是资产设计和维护的重要因素。为了更好地估计这种极端载荷条件下结构的疲劳寿命，已经完成了大量研究。然而，由于材料和结构性能的不确定性，无法提供资产疲劳寿命的真实估计。本文通过在墨西哥湾进行的大量现场试验，研究了深海洋流剖面下结构的疲劳评估。根据各种数值疲劳模型计算的疲劳寿命，使用真实VAL应力时程来研究结构的疲劳寿命。说明了基于CAL场景的简化疲劳模型的应用是非保守的，并导致在行业中实现了高安全系数。

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