| 内压下含局部减薄等径三通极限载荷的数值分析 |
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| 引用本文： | 王飞, 陈钢, 刘应华, 岑章志. 内压下含局部减薄等径三通极限载荷的数值分析[J]. 工程力学, 2005, 22(5): 218-224. |
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| 作者姓名： | 王飞 陈钢 刘应华 岑章志 |
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| 作者单位： | 1.清华大学工程力学系, 北京, 100084;2. 国家质量监督检验检疫总局锅炉压力容器检测研究中心, 北京, 100013 |
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| 基金项目： | 国家自然科学基金;全国高等学校优秀博士学位论文作者专项基金;国家科技攻关项目 |
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| 摘 要： | 采用弹塑性有限元方法,分析并验证了内压下无缺陷等径三通的塑性极限载荷,同时针对含局部减薄等径三通,系统地分析了局部减薄的尺寸、位置等因素对等径三通的塑性极限载荷的影响,得到了局部减薄对等径三通塑性极限载荷的影响规律,并分析了几种含局部减薄等径三通塑性破坏的典型失效模式.研究结果可为含局部减薄等径三通结构设计和安全评定提供理论依据和数值参考.
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| 关 键 词： | 极限分析 弹塑性有限元法 等径三通 局部减薄 失效模式 |
| 文章编号： | 1000-4750（2005）05-0218-07 |
| 收稿时间： | 2003-10-24 |
| 修稿时间： | 2003-10-242004-02-26 |
LIMIT ANALYSIS OF EQUAL-DIAMETER PIPING BRANCH JUNCTIONS WITH LOCAL WALL-THINNING UNDER INTERNAL PRESSURE |
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| WANG Fei, CHEN Gang, LIU Ying-hua, CEN Zhang-zhi. LIMIT ANALYSIS OF EQUAL-DIAMETER PIPING BRANCH JUNCTIONS WITH LOCAL WALL-THINNING UNDER INTERNAL PRESSURE[J]. Engineering Mechanics, 2005, 22(5): 218-224. |
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| Authors: | WANG Fei CHEN Gang LIU Ying-hua CEN Zhang-zhi |
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| Affiliation: | 1.Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;2. Center of Boiler and Pressure Vessel Inspection and Research, General Administration of Quality Supervision, Inspection and Quarantine, Beijing 100013, China |
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| Abstract: | In this paper,the elasto-plastic FEM is used to evaluate limit loads for equal-diameter piping branch junctions with local wall-thinning under internal pressure.Numerical examples of non-defective equal-diameter piping branch junctions show that the computed results are in good agreement with available experimental data.The size effects and the influence of local wall-thinning positions on the plastic limit loads of equal-diameter piping branch junctions are investigated.Some typical failure modes of equal-diameter piping branch junctions with local wall-thinning are studied.The obtained results may provide theoretical bases and numerical references for structural design and safety assessment of equal-diameter piping branch junctions with local wall-thinning. |
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| Keywords: | limit analysis elasto-plasticity FEM equal-diameter piping branch junctions local wall-thinning failure mode |
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