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首页> 外文会议>Asian Pacific Conference on Fracture and Strength;APCFS; 20061122-25;20061122-25; Sanya(CN);Sanya(CN) >Effects of the Welding Residual Stress on the Grounding Damage Analysis of a Tanker
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Effects of the Welding Residual Stress on the Grounding Damage Analysis of a Tanker

机译：焊接残余应力对油轮接地损伤分析的影响

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摘要

Vessels are rarely subjected to accidental loads such as the collision, grounding and stranding. But these accidental loads cause a lot of damages to hull structure including a large deformation, fracture, tearing and so on. In case of carrying dangerous goods such as crude oil, these accidents can induce a serious environmental pollution. All ocean-going vessels were made by welding. The welding residual stress is a significant shortcoming of welding remains at the hull structure, even though welding technology in shipbuilding field has provided a variety of advantages, e.g. remarkable shortening of the shipbuilding time. The aim of this paper is to investigate the effects of the residual stress in a grounding accident. When a ship runs aground against a sea-obstacle like a rock, this accident can be classified as a grounding. Among parameters of grounding accident scenarios such as the ship speed, the initial striking point, and loading conditions of the ship, only ship speed varies from 10 to 15 knots under ballast condition with/without consideration of residual stress(this sentence is not clear to the read). The initial striking point is at the bow of the center line of ship. A series of nonlinear numerical simulations with large deformation and fracture were carried out using LS-DYNA. As a result, two cases with residual stress have longer damage length. The difference seems to be relatively small, but not negligible.
机译：船只很少承受意外载荷，例如碰撞，接地和搁浅。但是这些意外载荷会对船体结构造成很多损坏，包括大变形，破裂，撕裂等。如果携带原油等危险物品，这些事故会导致严重的环境污染。所有远洋船都是通过焊接制成的。焊接残余应力是船体结构上焊接残留物的显着缺点，即使造船领域的焊接技术提供了多种优势，例如大大缩短了造船时间。本文的目的是研究接地事故中残余应力的影响。当船舶在岩石等海障碍物上搁浅时，此事故可被归类为搁浅。在诸如船速，初始撞击点和船的装载条件等接地事故场景的参数中，压载状态下有/没有考虑残余应力的情况下，只有船速从10到15节不等（这句话对于阅读）。最初的打击点是在船舶中心线的船头。使用LS-DYNA进行了一系列具有大变形和断裂的非线性数值模拟。结果，具有残余应力的两种情况具有更长的损伤长度。差异似乎相对较小，但不可忽略。

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