| 材料低温脆性对LNG船剩余极限强度的影响 |
| |
| 引用本文： | 李继中,唐文勇.材料低温脆性对LNG船剩余极限强度的影响[J].船舶工程,2015,37(6):22-26. |
| |
| 作者姓名： | 李继中 唐文勇 |
| |
| 作者单位： | 上海交通大学 海洋工程国家重点实验室 上海200240,上海交通大学 海洋工程国家重点实验室 上海200240 |
| |
| 摘 要： | 薄膜型LNG船在严重搁浅事故下存在破舱泄漏的可能,泄漏导致的低温会使船体结构发生脆性破坏。通过运用PCL语言对有限元软件Patran进行二次开发,自动迭代求解破舱后的结构温度场;结合船用钢低温下的材料特性,得出泄漏情况下的脆性影响范围;基于非线性有限元软件ABAQUS,假定脆性影响下的结构失去承载能力,计算了LNG船的剩余极限强度,通过与不考虑材料脆性下的结果进行对比,结果表明低温脆性对LNG船搁浅破舱情况下剩余极限强度有较大的减弱作用。
|
| 关 键 词： | LNG船 破舱 PCL语言 非线性有限元法 剩余极限强度 低温脆性 |
| 收稿时间： | 2014/11/30 0:00:00 |
| 修稿时间： | 3/2/2015 12:00:00 AM |
The effect of low temperature brittleness on the residual ultimate strength of LNG carriers in tank damage grounding scenarios |
| |
| Institution: | State Key Lab of Ocean Engineering,Shanghai Jiao Tong Univ. Shanghai 200240,State Key Lab of Ocean Engineering,Shanghai Jiao Tong Univ. Shanghai 200240 |
| |
| Abstract: | Membrane LNG carriers may have the risk of leakage in severe grounding scenarios, the hull structure may suffer brittle fracture due to the low temperature. With second development on the FEM platform Patran, program is developed to analysis the thermal distribution of the hull structure automatically; brittleness affected zone is derived with reference to the material property of normal marine steel under low temperature; Residual ultimate strength of the LNG carrier taking account of the brittleness is obtained with the aid of Nonlinear FEM software ABAQUS. Cryogenic effect on the residual ultimate strength is derived by comparing the result with that of not taking brittleness into account.. |
| |
| Keywords: | LNG carrier tank damage PCL Language nonlinear FEM residual ultimate strength low temperature brittleness |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《船舶工程》浏览原始摘要信息 |
| 点击此处可从《船舶工程》下载免费的PDF全文 |
