| 殷缘1,2，杨劢3 ，信琦3 ，陈云霞1.附件机匣振动力学行为及寿命分析[J].航空发动机,2018,44(1):52-57 |
| 附件机匣振动力学行为及寿命分析 |
| Analysis of Vibration Mechanics and Lifetime of Accessory Gearbox |
| |
| DOI： |
| 中文关键词: 附件机匣 有限元仿真 疲劳寿命 雨流循环计数法 应力响应功率谱 |
| 英文关键词:accessory gearbox finite element simulation fatigue lifetime rain-flow counting method stress response PSD |
| 基金项目:国家自然科学基金(51675025)资助 |
|
| 摘要点击次数: 1976 |
| 全文下载次数: 1237 |
| 中文摘要: |
| 附件机匣作为航空发动机的重要部件，获得其寿命指标至关重要，在对附件机匣壳体进行疲劳寿命分析时，需要充分考
虑其复杂多样的工作环境以及各载荷情况。基于ANSYS Workbench 有限元仿真，计算得到了附件机匣在考虑自身重力和固定约束
条件、轴承载荷、温度场以及振动载荷谱共同作用时的应力响应功率谱密度。采用雨流循环计数方法并通过MATLAB编程计算得到
附件机匣的疲劳寿命。结果表明：振动谱沿Z轴得到的等效应力值最大，且最大点的应力响应PSD谱中滓x的总均方根值远大于其
余应力。单独采用滓x应力PSD谱和采用所有应力PSD谱计算得到的寿命相差仅50 min，因此可采用RMS 最大的滓x应力PSD谱计
算附件机匣的疲劳寿命 |
| 英文摘要: |
| Accessory gearbox is a key component of aeroengine, and acquisition of its lifetime index is critically important. When
analyzing the fatigue lifetime of accessory gearbox case, the complex and diverse working environment and loading conditions should be
considered. Based on ANSYS Workbench finite element simulation, the stress response PSD of accessory gearbox was calculated,which
taken own gravity, fixed constraints, bearing loads, temperature field,and vibration load spectrum into account. After that, the fatigue lifetime
was calculated according to the rain-flow counting method through MATLAB program. The results show that the equivalent stress of the
vibration spectrum along the Z-axis is max, and the RMS of the stress response PSD at the max point is much greater than the rest of the
stress. The difference of the lifetime calculated between using stress response PSD individually and all stress response PSDs is only 50
minutes. Thus, the maximum RMS stress PSD can be used to calculte the fatigue lifetime of accessory gearbox. |
| 查看全文 查看/发表评论 下载PDF阅读器 |