标题： 采用数值FEM的螺栓连接高效装配 显示英文标题

标题： Efficient assembly of bolted joints using numerical FEM

摘要： 螺栓法兰连接中的泄漏可能由多种因素引起，其中外部载荷是最重要的因素。 诸如不对中引起的外部载荷会引入轴向载荷和弯矩的组合，这可能导致垫片过度压缩并随后被压碎，和/或法兰分离，从而导致泄漏故障。 已经进行了多项研究来研究这些有害影响，但尚未提出实际解决方案来弥补它们。 在此背景下，本研究提出了一种数值方法，通过迭代计算非均匀的螺栓预紧力分布来实现均匀的垫片应力分布，从而提高承受外部载荷的螺栓接头的泄漏性能。 显示英文摘要

摘要： Several factors can cause leakages in a bolted flange connection, external loads being the most important one. External loads such as those produced by misalignment introduce an external axial load combined with a bending moment which could lead to either an excessive compression of the gasket and its subsequent crushing, and/or a separation of the flanges causing leakage failure. Several studies have been carried out to study these prejudicial effects, but no practical solutions are proposed to compensate for them. In this sense, this work presents a numerical methodology that iteratively calculates the non-uniform bolt tightening load distribution to achieve a uniform gasket stress distribution that improves the leakage performance of bolted joints subjected to external loads.