作者：边智¹, 陈允², 崔博源², 孟理华¹

作者单位：1. 中国航空综合技术研究所, 北京 100028;
2. 中国电力科学研究院有限公司, 北京 100192

关键词：材料失效与保护;老化寿命评估;加速寿命试验;O型密封圈

摘要：

传统的密封圈寿命评估多采用加速寿命试验完成，由于评估用的失效判据（压缩永久变形）与实际密封性能难以关联，导致评估的寿命偏保守。因此，该文提出基于回归分析的统计建模方法，运用仿真与实验综合分析密封圈的性能退化规律。首先，应用加速寿命试验得到不同使用状态的密封圈，并测试得到其性能参数。然后，通过仿真分析的方法得到各密封圈的接触应力。最后，应用统计分析的方法实现其整体退化规律的建模。该模型可以准确分析密封圈的退化规律，并依据密封圈失效准则，实现其寿命预测。

Research on the law of performance degradation of seal ring in accelerated lifetime test and simulation
BIAN Zhi¹, CHEN Yun², CUI Boyuan², MENG Lihua¹
1. AVIC China Aero-polytechnology Establishment, Beijing 100028, China;
2. China Electric Power Research Institute Co., Ltd., Beijing 100192, China
Abstract: The traditional aging life assessment of O-ring is mostly completed by the accelerated life test. The failure criterion used for evaluation (compression set) is difficult to relate with the actual seal performance (leakage rate), which result in that the life expectancy of the assessment is conservative. In view of the problems above, this paper puts forward a statistical modeling method which is based on regression analysis. This method uses simulation and experiment to synthetically analyze the degradation law of the aging performance of the O-ring. Firstly, accelerated life test is applied, to get O-rings with different states. And the performance parameters of these O-ring are tested. Then the contract stress of each O-ring is obtained through simulation analysis. Finally, the method of statistical analysis is applied to realize the modeling of O-ring's overall degradation law. The model can accurately analyze the degradation law of the O-ring and predict the life of the O-ring according to the failure criterion.
Keywords: failure and protection of materials;evaluation of aging life;accelerated life test;O seal ring
2019, 45(9):138-142,148  收稿日期: 2018-06-05;收到修改稿日期: 2018-07-26
基金项目:
作者简介: 边智(1986-),男,内蒙古呼和浩特市人,副高级工程师,硕士,研究方向为机械产品寿命预测及耐久性评估
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