冲击响应谱在卫星运输冲击响应分析中的应用

Application of shock response spectrum in analysis of satellite transportation shock response

  • 摘要: 卫星运输过程中的动力学环境存在一定的随机性与不确定性,给卫星的安全运输带来隐患。目前工程上尚未形成通用化的卫星运输仿真方法,也未制定指导性的运输分析力学环境条件。文章提取卫星运输过程中经常出现的2种典型斜坡形式的冲击信号,基于ABAQUS软件建立卫星与运输支撑工装的有限元模型,分别开展了瞬态响应与冲击响应谱分析。结果表明,相比于瞬态响应分析,冲击响应谱分析节约了95%的运算量,且分析偏差在17%以内,并能够实现对响应最大情况的包络,可更好地满足工程上对仿真分析快速且准确的需求。

     

    Abstract: The dynamics environment during satellite transportation exhibits some randomness and uncertainty, which may bring hidden troubles to the safety of satellite transportation. At present, there is neither universal satellite transportation simulation method in engineering nor guiding mechanical environmental conditions for transportation analysis. In this paper, two typical ramp shock signals that can often be caught during satellite transportation were extracted, and finite element model of satellite and its support structure for transportation was established based on ABAQUS software. The analyses of transient response and shock response spectrum (SRS) were conducted respectively. The results show that, compared with transient response analysis, SRS analysis saves 95% of the computing load with a deviation of not more than 17%, as well as implements an envelop for the maximum stress response, indicating that SRS analysis may better meet the demand of fast and accurate simulation in satellite engineering practice.

     

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