Bennett机构构型的环形可展天线桁架热致振动分析  

Heat-induced Vibration Analysis of Annular Deployable Antenna Truss with Bennett Mechanism Configuration

作　　者：尹振巍 潘文博 周凯红[1] 张乐坦 李梓仪 YIN Zhenwei;PAN Wenbo;ZHOU Kaihong;ZHANG Letan;LI Ziyi(College of Mechanical and Control Engineering,Guilin University of Technology,Guilin 541006,Guangxi,China;School of Architecture and Art,Central South University,Changsha 410017,China;College of Geomatics and Geoinformation,Guilin University of Technology,Guilin 541006,Guangxi,China)

机构地区：[1]桂林理工大学机械与控制工程学院,广西桂林541006 [2]中南大学建筑与艺术学院,长沙410017 [3]桂林理工大学测绘地理信息学院,广西桂林541006

出　　处：《噪声与振动控制》2024年第6期73-76,90,共5页Noise and Vibration Control

基　　金：国家自然科学基金面上资助项目(52075110);广西自然科学基金重点资助项目(2022JJD160036)。

摘　　要：卫星在运行过程中会频繁进出地球阴影区,天线桁架在太阳热辐射和无辐射的交替影响下,会产生热致振动响应,从而影响天线的使用精度和寿命。为提高天线的稳定性,以Bennett机构替代构型构建环形天线桁架,并建立有限元模型,计算其在突加热载荷条件下的瞬态温度场;通过热-结构间接耦合仿真,分析桁架在突加热载荷条件下的热致振动响应,并与传统的对角线伸缩式环形桁架进行比较。结果表明,相比于传统的对角线伸缩式环形桁架,Bennett替代构型环形桁架在热载荷作用下振幅明显减小,表现出良好的稳定性。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 established 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 

分 类 号：O241.82[理学—计算数学] V414[理学—数学] TH212[航空宇航科学与技术—航空宇航推进理论与工程]