| 叶片振动可靠性评估方法研究 |
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| 引用本文： | 欧阳德,孔瑞莲,宋兆泓.叶片振动可靠性评估方法研究[J].航空动力学报,1998,13(2):161-164,219. |
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| 作者姓名： | 欧阳德 孔瑞莲 宋兆泓 |
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| 作者单位： | 北京航空航天大学 |
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| 摘 要： | 提出一种用于发动机叶片振动可靠性评估方法，该方法基于叶片共振转速图（Ｃａｍｐｂｅｌ），引入概率故障树ＰＦＴＡ（ＰｒｏｂａｂｉｌｉｔｙＦａｕｌｔＴｒｅｅＡｎａｌｙｓｉｓ）概念，改善了传统评估方法。其目的是为发展叶片共振识别和可靠性评估的有效方法。在Ｃａｍｐｂｅｌ图上，叶片共振系统定义由工作转速点和附近的多个共振点组成。利用ＰＦＴＡ分析该系统能获得更多的叶片振动信息。该方法发展了常规的叶片振动可靠性设计方法，为叶片设计和叶片振动疲劳排故中改善叶片振动特性提供有益的工程评估方法。
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| 关 键 词： | 航空发动机 叶片 振动 可靠性估计 |
| 收稿时间： | 4/1/1997 12:00:00 AM |
| 修稿时间： | 9/1/1997 12:00:00 AM |
AN ASSESSMENT METHOD FOR BLADE VIBRATION RELIABILITY |
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| Ou Yangde,Kong Ruilian and Song Zhaohong.AN ASSESSMENT METHOD FOR BLADE VIBRATION RELIABILITY[J].Journal of Aerospace Power,1998,13(2):161-164,219. |
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| Authors: | Ou Yangde Kong Ruilian and Song Zhaohong |
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| Institution: | 4th Dept.Beijing University of Aeronautics and Astronautics,Beijing 100083;4th Dept.Beijing University of Aeronautics and Astronautics,Beijing 100083;4th Dept.Beijing University of Aeronautics and Astronautics,Beijing 100083 |
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| Abstract: | A method is presented to assess the vibration reliability for blade design.The method based on Campbell diagram and the concept of PFTA (Probability Fault Tree Analysis) is used to improve conventional assessment methods,and aims at developing an effective method for resonance identification and assessment of the characteristics of blade resonance system,which consists of multiple resonant interception on the Campbell diagram at or near the operating speed.Much information will be obtained from this PFTA analysis,and it is useful for designer to improve the vibration characteristics of a given blade in design and in elimination of failure blade yielded from vibration fatigue. |
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| Keywords: | Vibration Aircraft engines Blades Reliability estimation |
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