航天密封舱设备安装精度仿真分析方法

Simulation Analysis Method of Mounting Accuracy of Space Sealed Cabin Equipments

针对航天密封舱设备安装精度受密封舱内压影响却没有实用的理论预示方法,提出了仿真分析设备安装精度的方法。该方法根据有限元结构仿真分析得到的位移,导出设备的安装精度;另外,提出了精测数据的分析方法,使设备的安装精度变化规律更明显,更容易看出设备旋转的旋转轴、旋转方向、旋转角度,也使精测数据与仿真数据的对比更容易,可为验证仿真分析的准确性提供前提条件。利用一个算例对文章提出的仿真分析方法进行了验证。结果表明,仿真分析方法能准确地确定设备安装角度变化的旋转轴和旋转方向,计算出的旋转角度值与精测结果也基本一致。

With considering the lack of practical and theoretical prediction method for influence of space sealed cabin pressure on equipment mounting accuracy, a simulation method is proposed in this paper. The method can transform displacement obtained from finite element structural analy- sis to equipment mounting accuracy. Besides, this paper puts forward a method to analyze the da- ta of mounting accuracy test which makes the rotation axis, rotation direction and rotation angle more obvious, and the comparison between test data and simulation data easier. This method provides a precondition for verifying the correctness of simulation analysis. The paper puts up an example to validate the simulation analysis method. The result shows that the simulation method can confirm the rotation axis and the rotation direction exactly and the rotation angle is in the same amount level as the test result.