| 不同频率激励下LY12铝合金悬臂梁的疲劳特性 |
| |
| 引用本文： | 唐振杰,史展飞,胡海涛.不同频率激励下LY12铝合金悬臂梁的疲劳特性[J].材料科学与工程学报,2012,30(3):384-388. |
| |
| 作者姓名： | 唐振杰 史展飞 胡海涛 |
| |
| 作者单位： | 1. 西北工业大学航空学院,陕西西安,710072
2. 陕西千山航空电子有限责任公司,陕西西安,710065 |
| |
| 基金项目： | 国家自然科学基金资助项目，111引智计划资助项目 |
| |
| 摘 要： | 为了研究激励频率对悬臂梁结构疲劳特性的影响,本文针对LY12铝合金悬臂梁在不同频率(139Hz、141Hz、143Hz)激励下进行了同一应力水平的振动疲劳试验。结果表明:该结构的疲劳特性在不同频率激励下存在差异。在激励频率高于固有频率振动时,结构疲劳寿命最长;激励频率低于固有频率振动时,结构疲劳寿命较短;在固有频率振动时,结构疲劳寿命最短。
|
| 关 键 词： | 悬臂梁 振动疲劳 频率 疲劳特性 |
Fatigue Properties of LY12 Cantilever Beam under Different Vibration Frequencies |
| |
| TANG Zhen-jie,SHI Zhan-fei,HU Hai-tao.Fatigue Properties of LY12 Cantilever Beam under Different Vibration Frequencies[J].Journal of Materials Science and Engineering,2012,30(3):384-388. |
| |
| Authors: | TANG Zhen-jie SHI Zhan-fei HU Hai-tao |
| |
| Affiliation: | 1(1.School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;2.Shaanxi Qianshan Avionics Corporation,Xi’an 710065,China) |
| |
| Abstract: | In order to study the fatigue properties of cantilever beam under different excitation frequencies,the fatigue life of LY12 aluminum alloy cantilever beams were tested by vibration shaker at different excitation frequencies(139Hz,141Hz,143Hz) under the same stress level.The results show that the fatigue properties of the structure were different under different excitation frequencies.When the excitation frequency was equal to the natural frequency,the fatigue life would be the shortest one.However,the longest fatigue life was observed when the excitation frequency was higher than the natural frequency. |
| |
| Keywords: | cantilever beam vibration fatigue frequency fatigue properties |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
