大型环形桁架天线进出地影期热致振动特性研究

发布时间：2018-03-28 06:16

  本文选题：环形桁架天线　切入点：在轨　出处：《中国科学:物理学 力学 天文学》2017年10期

【摘要】：对一类装备大型环形桁架天线的航天器在轨环境下的热-结构耦合问题进行了研究.将结构应变考虑为热应变与弹性应变的线性叠加,引入了热-弹耦合的线性时变刚度,建立了环形桁架天线的索网-框架组合结构热-弹耦合动力学方程.考虑了航天器姿态角的变化以及航天器部件遮挡对各部件温度变化的影响,建立了时变温度场模型.将得到的温度场作为外载荷激励,分析了进出地影期温度变化对航天器结构热致振动的影响规律,研究结果显示在轨温度环境对该结构影响不大.对某型号航天器在轨数据进行了分析,验证了数值分析的有效性.
[Abstract]:The thermal-structural coupling problem of a class of spacecraft equipped with large annular truss antennas in orbit environment is studied. The structural strain is considered as the linear superposition of thermal strain and elastic strain, and the linear time-varying stiffness of thermal-elastic coupling is introduced. The thermal-elastic coupling dynamic equation of cable-frame composite structure for annular truss antenna is established. The change of spacecraft attitude angle and the influence of spacecraft component occlusion on the temperature change of each component are considered. The time-varying temperature field model is established. The temperature field is used as the external load excitation to analyze the influence of the temperature change on the thermal induced vibration of spacecraft structure during the period of moving in and out of the earth. The results show that the on-orbit temperature environment has little effect on the structure. The on-orbit data of a certain type of spacecraft are analyzed and the validity of the numerical analysis is verified.
【作者单位】： 中国空间技术研究院西安分院;
【基金】：国家自然科学基金(编号:11290154,11402196,U1537213)资助项目
【分类号】：TN820;V443.4
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本文编号：1675097