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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >A STUDY ON THE EFFICACY OF AIRFLOW MITIGATION DEVICES IN HARD DISK DRIVE!
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A STUDY ON THE EFFICACY OF AIRFLOW MITIGATION DEVICES IN HARD DISK DRIVE!

机译：硬磁盘驱动器中气流缓解设备的效率研究！

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摘要

Numerical simulations have revealed several general insights into the flows inside disk drives casings. In close proximity to the actuator arm, especially in the region of the base-plate and suspension, M1 and M2 have the smallest RMS in-plane and out-of-plane velocity fluctuations. M1 and M2 also have the smallest pressure fluctuations in this region while M3 appears to be a bad candidate based on all the RMS data presented. Since pressure-based loading on the actuator accounts for most of the off-track vibrations, both M1 and M2 appear to be suitable candidates for reducing flow induced vibrations. However, we note that velocity fluctuations are also responsible for fluctuation of the forces on the actuator, and their effect may not appear directly in the RMS of the pressure fluctuations, which is a second order statistical moment. Changes in the velocity field near the arm cause changes in circulation around the arm, which is linearly related to the loading on the actuator arm. Taking this into consideration, it appears that M1 is a better candidate than M2 for reducing flow induced vibrations.
机译：数值模拟揭示了对磁盘驱动器外壳内部流动的一些一般见解。在靠近执行器臂的地方，尤其是在基板和悬架区域，M1和M2的RMS面内和面外速度波动最小。根据提供的所有RMS数据，M1和M2在该区域内的压力波动也最小，而M3似乎是不好的候选者。由于执行器上的基于压力的负载会导致大部分偏离轨道的振动，因此M1和M2似乎都是减少流动引起的振动的合适候选者。但是，我们注意到速度波动也是造成执行器上力波动的原因，它们的影响可能不会直接出现在压力波动的RMS中，这是一个二阶统计矩。臂附近的速度场的变化会引起臂周围的循环变化，这与致动器臂上的负载线性相关。考虑到这一点，似乎M1比M2在减少流动引起的振动方面更好。

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