@inproceedings{oai:jaxa.repo.nii.ac.jp:00004920,
 author = {間庭, 和聡 and 野木, 高 and 小原, 新吾 and Maniwa, Kazuaki and Nogi, Takashi and Obara, Shingo},
 book = {宇宙航空研究開発機構特別資料: 第41回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2009論文集, JAXA Special Publication: Proceedings fo 41st Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2009},
 month = {Feb},
 note = {平成21年6月18-19日. 宇宙航空研究開発機構調布航空宇宙センター, 18 June-19 June, 2009, Japan Aerospace Exploration Agency, A three-dimensional dynamic simulation of a ball bearing was performed to examine the effect of gravity on retainer behavior taking account of the oil film and the roughness of retainer surface. In the dynamic simulation model of ball bearing, the mixed lubrication models based on hydrodynamic lubrication and solid-to-solid contact theories were applied for each retainer-race and retainer-ball contacting interface. The frictional torque, the retainer motion and its translational velocity were calculated for both gravity conditions on orbit (0 G) and on the ground (1 G). The calculation results show that an increase in the amount of oil causes high friction forces to the retainer surface, lead to the unstable motion of the retainer. Comparing the retainer behaviors on orbit and on the ground, the retainer moves the most severely when the bearing operates in horizontal shaft attitude on the ground. In addition, FFT analysis of the retainer motion showed that the retainer behavior under stable condition was characterized by the frequency corresponding to the retainer rotational speed. On the other hand, for the instable condition the kinetic energy of retainer increased in the calculated frequency range with no distinctive frequency peak., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0064672022, レポート番号: JAXA-SP-09-011},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {軌道上におけるリアクションホイール用玉軸受の保持器挙動の数値シミュレーション},
 volume = {JAXA-SP-09-011},
 year = {2010}
}