Satellites will frequently enter and leave the shadow area of the earth during operation,and the antenna truss will produce heat-induced vibration responses under the alternative influence of solar thermal radiation and non-radiation,which will affect the accuracy and life of the antenna.In order to improve the stability of the antenna,the loop antenna truss was constructed with the use of the substitution configuration of Bennett mechanism,and the finite element model was estab-lished to calculate its transient temperature field under the condition of sudden heating load,and the heat-induced vibration response under the heating loads.The results were compared with those of the conventional diagonal telescopic ring truss.It is shown that,compared with the traditional diagonal telescopic ring truss,the vibration amplitude of the Bennett alternative configuration ring truss is significantly reduced under the thermal load,which demonstrates a good stability.
关键词
振动与波/Bennett替代构型/可展天线/有限元分析/间接耦合/热致振动
Key words
vibration and wave/Bennett mechanism substitution configuration/expandable antenna/finite element analysis/indirect coupling/heat-induced vibration
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