摘要：Combining with the exigent demand of the development of satellite gravimetry system in China, aiming at the determination of technical indexes of gravity satellite orbit parameters, on the basis of the numerical experiments and results analysis, the design indexes of gravity satellite orbit height, inter-satellite range and the orbit inclination are analyzed and calculated, and the issues towards twin gravity satellites such as coherence requirement of the orbit semi-major axes, control requirement of the pitch angle and time interval requirement to keep twin satellites formation in mobility are diseussed. Results show that the satellite orbit height is 400 km to 500 km, the inter-satellite range is about 220 km, the satellite orbit inclination is between polar orbit and sun-synchronous orbit, the semi-major axes difference of twin satellites orbit is within ± 70. 146 m, the pitch angle of twin satellites is about 0.9 degree, and the time interval to keep twin satellites formation in mobility is 7 days to 15 days.

摘要：在舰船摇摆作用下,利用拉格朗日方程建立滑动轴承-齿轮副系统动力学模型。模型中引入非线性油膜力,将齿面、齿背侧啮合力同时考虑。计算了不同输入转速、扭矩作用下齿轮轴静平衡位置,及船体纵横摇摆下齿轮副的振动响应。为研究齿轮副相对于摇心偏置位置的影响作用,计算了不同偏置位置下系统的位移、啮合力及油膜力变化情况,发现随着偏置距离的增加,齿轮的振动响应、轴承油膜力幅值明显增大,油膜力方向大范围波动。此外观察了较小齿侧间隙下摇摆引起的挤齿现象,发现挤齿现象可仅在一侧偏置方向上发生。从齿轮及轴承安全性角度,为舰船设计中齿轮箱布置位置提供理论参考。