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| 带凸肩叶片非线性振动响应分析 | |
| 引用本文： | 史亚杰,单颖春,朱梓根.带凸肩叶片非线性振动响应分析[J].航空动力学报,2009,24(5):1158-1165. |
| 作者姓名： | 史亚杰 单颖春 朱梓根 |
| 作者单位： | 1. 中国民用航空总局航空安全技术中心,航空安全研究所,北京,100028 2. 北京航空航天大学,交通科学与工程学院,北京,100191 3. 北京航空航天大学,能源与动力工程学院,北京,100191 |
| 摘 要： | 基于时频转换的思想,提出了一套利用叶片自由模态求解带凸肩叶片非线性振动响应的方法.该方法消除了原来方法在时频转换过程中存在的一些问题,并考虑了振动过程中接触刚度随正压力的变化,提高了计算效率和结果的准确性,计算结果与试验结果具有很好的一致性,完全能够满足叶片减振设计的工程需要.此外,还分析了自由模态阶数对计算结果的影响,发现当接触面接近自由时,需要少阶的叶片自由模态就能得到准确结果;而当接触面接近粘滞时,需要较多阶的模态才能得到准确响应. |
| 关 键 词： | 接触刚度 干摩擦 振动 凸肩 叶片 |
| 收稿时间： | 2008/4/22 0:00:00 |
| 修稿时间： | 2008/9/25 0:00:00 |
Analysis of nonlinear response of shrouded blades system |
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| SHI Ya-jie,SHAN Ying-chun and ZHU Zi-gen.Analysis of nonlinear response of shrouded blades system[J].Journal of Aerospace Power,2009,24(5):1158-1165. | |
| Authors: | SHI Ya-jie SHAN Ying-chun and ZHU Zi-gen |
| Institution: | 1.Aviation Safety Technology Research Institute;Center of Aviation Safety Technology;Civil Avivation Administration of China;Beijing 10028;China;2.School of Transportation Science and Engineering;Beijing University of Aeronautics and Astronautics;Beijing 1000191;3.School of Jet Propulsion;Beijing 100191;China |
| Abstract: | Base on the idea of alternating frequency/time(AFT) domain,an approach to predict the nonlinear response of a shrouded blade system was developed using free mode shapes.Some sources of error in the process of previous AFT were eliminated and the instantaneous variety of contact stiffness was taken into account,improving evidently the correctness and efficiency.Comparison of the calculated and experimental results proves that this method meet the engineering need of blade damping design fully.Furthermore,inf... |
| Keywords: | contact stiffness dry friction vibration shroud blade |
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