| 压力容器裂纹缺陷剩余寿命预测 |
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| 引用本文： | 徐崇,龙伟,田大庆,林思建.压力容器裂纹缺陷剩余寿命预测[J].机械设计与制造工程,2014(8):74-77. |
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| 作者姓名： | 徐崇 龙伟 田大庆 林思建 |
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| 作者单位： | 四川大学制造科学与工程学院,四川成都610065 |
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| 基金项目： | 国家自然科学基金资助项目（51075286） |
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| 摘 要： | 针对压力容器所含缺陷安全程度这一问题，在试验的基础上，运用失效路径仿真与失效速率仿真的手段，以速率拐点为安全裕度终点，给出了一种预测裂纹缺陷剩余寿命的计算方法，并指出了剩余寿命的影响因素。该方法以国标GB/T 19624-2004《在用含缺陷压力容器安全评定》为理论依据，沿着缺陷失效路径计算其剩余寿命，考虑了随着安全裕度的衰减失效速率的变化，运用积分方程和Pairs迭代公式，可以计算出裂纹缺陷在任何尺寸的动态安全裕度。
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| 关 键 词： | 压力容器 裂纹缺陷 速率拐点 剩余寿命 安全裕度 |
The Residual Life Prediction for Pressure Vessel Crack Defects |
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| XU Chong,LONG Wei,TIAN Daqing,LIN Sijian.The Residual Life Prediction for Pressure Vessel Crack Defects[J].Machine Design and Manufacturing Engineering,2014(8):74-77. |
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| Authors: | XU Chong LONG Wei TIAN Daqing LIN Sijian |
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| Affiliation: | (Sichuan University, Sichuan Chengdu, 610065, China) |
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| Abstract: | Aiming at the defect security levels of pressure vessel , it proposes a method for crack defect＆#39;s residual life calculation on the basis of experiment and simulation of failure patch and failure rate .This method takes the rate inflection point as the end of safety margin , provides the residual life of influencing factors .The method is on account of 《Safety assessment of pressure vessel with defect in service》and integral equation and iterative for-mula, calculates the residual life along the failure path , takes the failure rate with the attenuation of safety mar-gin, can obtain the dynamic safety margin of crack defect in any size . |
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| Keywords: | Pressure Vessel Crack Defect Rate Inflection Point Residual Life Safety Margin |
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