航天器全频域力学环境预示技术研究进展

RESEARCH PROGRESS ON FULL-FREQUENCY PREDICTION TECHNIQUES OF SPACECRAFT’S MECHANICAL ENVIRONMENT

航天器力学环境预示对于总体设计、结构与机构分系统设计是至关重要的,特别是对于首发型号,往往缺乏相似型号的遥测数据参考,使得有效的预示成为地面试验方案和试验条件确定的主要依据.航天器在发射段需要承受覆盖全频域的动态载荷,不同频段的载荷和结构振动响应特性差异很大,很难用单一的分析方法进行准确预示.本文分别针对航天器发射力学环境的低频、高频、中频3个频段,介绍了国内外航天器全频域力学环境预示的主要方法及其工程应用的研究进展,并提出了我国在该领域亟需解决的关键技术.

The mechanical environment prediction technique of spacecraft is critical to spacecraft system design and structure design, especially to spacecraft for first launch, since it lacks telemetry data from similar spacecraft and thus could only rely on effective prediction means to establish the ground test scheme and related test requirements. No individual analysis method could get accurate prediction results for full-frequency bands currently, because spacecraft at launch experiences full-frequency dynamic loads, which bring about great discrepancy of structure responses at different frequencies. The full-frequency mechanical environment prediction technique is described regarding low-frequency, mid-frequency and high-frequency band, respectively. In the end, according to the requirement of domestic spacecraft engineering, the main research directions are presented for the full-frequency mechanical environment prediction.