Abstract
Introducing friction damping devices in blade structures is an effective measure to reduce the failure rate of aero-engine. The component motion perpendicular to contact surface leads the normal load to vary during vibration, and phase difference of adjacent blades makes the variation non-linear. This article analyzed the influence of non-linearly variable normal load on damper's vibration-reducing effect, and deduced the formula of hysteresis curve. Using the model raised, this article calculated the vibratory response of a shrouded blade structure and compared the result with experimental data. The conclusion is that macroslip model under the condition of non-linearly variable normal load is accurate and effective in terms of predicting the vibratory response of shrouded blade structure.
| Original language | English |
|---|---|
| Pages (from-to) | 205-210 |
| Number of pages | 6 |
| Journal | Vibroengineering Procedia |
| Volume | 5 |
| State | Published - 1 Sep 2015 |
| Event | International Conference on Vibroengineering - 2015 - Nanjing, China Duration: 26 Sep 2015 → 28 Sep 2015 |
Keywords
- Blade vibration
- Friction damping
- Friction force model
- Macroslip
- Nonlinearity
- Shroud
- Variable normal load
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