CAJ | 학술논문

安装在支架上的航天器设备的随机环境条件的制定一般是以经验为基础，并通过试验结果修正，而对于全新构型的航天器，其设备的随机环境条件的制定则只能依靠试验。鉴于目前没有一种成熟的分析方法能在航天器研制初期得出设备安装界面处的噪声响应，文章提出采用 FE-SEA 方法，将含支架组件和航天器结构本体看成互相独立的两部分，分别采用不同子系统建模，并以“嫦娥三号”某推力器组件噪声试验数据进行了验证。分析结果表明，含支架组件和航天器结构本体分别采用FE和SEA子系统建模，可准确地获得设备安装界面处高频噪声响应，结合低频噪声分析，可作为制定设备随机环境条件的参考。
안장재지가상적항천기설비적수궤배경조건적제정일반시이경험위기출，병통과시험결과수정，이대우전신구형적항천기，기설비적수궤배경조건적제정칙지능의고시험。감우목전몰유일충성숙적분석방법능재항천기연제초기득출설비안장계면처적조성향응，문장제출채용 FE-SEA 방법，장함지가조건화항천기결구본체간성호상독립적량부분，분별채용불동자계통건모，병이“항아삼호”모추력기조건조성시험수거진행료험증。분석결과표명，함지가조건화항천기결구본체분별채용FE화SEA자계통건모，가준학지획득설비안장계면처고빈조성향응，결합저빈조성분석，가작위제정설비수궤배경조건적삼고。
The establishment of a random vibration environment condition of an equipment mounted on a bracket is usually based on experience to be modified by the test results. The random vibration environment for spacecraft with a new configuration can only be established by tests, and the acoustic test is the only way to do that. Since there is no appropriate analysis method for such equipment to obtain the acoustic response of mounting interfaces in the initial stages of the spacecraft research, a hybrid FE-SEA method is suggested in this paper, in which the unit (with bracket) and the other part of the spacecraft are treated separately, and modeled in different subsystems. A thruster unit of Chang’E-3 is analyzed by this method, and the results are compared with the acoustic tests. It is shown that the high frequency part is obtained accurately by modeling the unit (with bracket) and the other part of the spacecraft in FE and SEA subsystem separately. Combined with the low frequency analysis, the response results can be a reference in establishing the random vibration test condition of the equipment.