| 含裂纹船用气瓶安全评价及剩余寿命预测 |
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| 引用本文： | 何冠军,刁爱民,李海涛,何建峰.含裂纹船用气瓶安全评价及剩余寿命预测[J].中国舰船研究,2013(5):58-63. |
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| 作者姓名： | 何冠军 刁爱民 李海涛 何建峰 |
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| 作者单位： | 海军工程大学动力工程学院;海军工程大学船舶振动噪声重点实验室;中国人民解放军92119部队 |
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| 基金项目： | 国家自然科学基金资助项目(51009143);高等学校全国优秀博士学位论文作者专项资金资助项目(201057) |
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| 摘 要： | 针对船用气瓶使用过程中出现的疲劳失效问题，开展含裂纹气瓶安全评价及剩余寿命预测研究，通过疲劳裂纹扩展速率试验，得到疲劳裂纹扩展速率公式。对3种典型尺寸表面裂纹进行理论计算，获得船用气瓶安全评定结果和临界裂纹尺寸，并通过3种人工预制裂纹疲劳试验和安全评价验证理论公式的合理性。评定结果表明：当初始裂纹深度a]≤1.5 mm，长度2c]≤10 mm时，船用气瓶可安全使用至下一周期。
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| 关 键 词： | 疲劳裂纹扩展速率 临界裂纹 安全评价 剩余寿命 船用气瓶 |
Safety Assessment and Remaining Service Life Prediction of Cracked Marine Air Bottles |
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| HE Guanjun;DIAO Aimin;LI Haitao;HE Jianfeng.Safety Assessment and Remaining Service Life Prediction of Cracked Marine Air Bottles[J].Chinese Journal of Ship Research,2013(5):58-63. |
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| Authors: | HE Guanjun;DIAO Aimin;LI Haitao;HE Jianfeng |
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| Institution: | HE Guanjun;DIAO Aimin;LI Haitao;HE Jianfeng;College of Power Engineering,Naval University of Engineering;National Key Laboratory on Ship Vibration & Noise,Naval University of Engineering;The 92119th Unit of PLA; |
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| Abstract: | Based on the fatigue failure analysis of marine air bottles, the research on the safety assessment and remaining service life prediction is conducted in this paper. Particularly, the formula to calculate the fatigue crack growth rate is obtained via fatigue crack testing： three typical types of crack on marine air bottles are investigated, and the corresponding safety assessment results as well as the critical crack size are obtained. It is seen that the theoretical formula is valid, and that the air bottle can be safely used till next cycle as long as the initial crack depth a]≤1.5 mm, and the length 2c]≤10 mm. |
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| Keywords: | fatigue crack growth critical crack safety assessment remaining service life marine airbottles |
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