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首页> 外文期刊>Reliability Engineering & System Safety >Partial safety factor calibration from stochastic finite element computation of welded joint with random geometries
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Partial safety factor calibration from stochastic finite element computation of welded joint with random geometries

机译：基于随机几何形状的焊接接头随机有限元计算的部分安全系数校准

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摘要

Welded joints are used in various structures and infrastructures like bridges, ships and offshore structures, and are submitted to cyclic stresses. Their fatigue behaviour is an industrial key issue to deal with and still offers original research subjects. One of the available methods relies on the computing of the stress concentration factor. Even if some studies were previously driven to evaluate this factor onto some cases of welded structures, the shape of the weld joint is generally idealized through a deterministic parametric geometry. Previous experimental works however have shown that this shape plays a key role in the lifetime assessment. We propose in this paper a methodology for computing the stress concentration factor in presence of random geometries of welded joints. In view to make the results available by engineers, this method merges stochastic computation and semi-probabilistic analysis by computing partial safety factors with a dedicated method. (C) 2016 Elsevier Ltd. All rights reserved.
机译：焊接接头用于各种结构和基础设施，例如桥梁，船舶和海上结构，并承受周期性应力。它们的疲劳行为是要处理的工业关键问题，并且仍然是原始的研究课题。一种可用的方法依赖于应力集中系数的计算。即使以前进行了一些研究来对某些焊接结构案例进行此因素评估，但通常还是通过确定的参数几何来理想化焊接接头的形状。但是，以前的实验工作表明，这种形状在寿命评估中起着关键作用。我们提出了一种在存在随机几何形状的焊接接头时计算应力集中系数的方法。为了使工程师可以得到结果，该方法通过使用专用方法将部分安全系数计算出来，将随机计算和半概率分析相结合。 （C）2016 Elsevier Ltd.保留所有权利。

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