本文選題：環(huán)形桁架天線　切入點：在軌　出處：《中國科學(xué):物理學(xué) 力學(xué) 天文學(xué)》2017年10期

【摘要】：對一類裝備大型環(huán)形桁架天線的航天器在軌環(huán)境下的熱-結(jié)構(gòu)耦合問題進行了研究.將結(jié)構(gòu)應(yīng)變考慮為熱應(yīng)變與彈性應(yīng)變的線性疊加,引入了熱-彈耦合的線性時變剛度,建立了環(huán)形桁架天線的索網(wǎng)-框架組合結(jié)構(gòu)熱-彈耦合動力學(xué)方程.考慮了航天器姿態(tài)角的變化以及航天器部件遮擋對各部件溫度變化的影響,建立了時變溫度場模型.將得到的溫度場作為外載荷激勵,分析了進出地影期溫度變化對航天器結(jié)構(gòu)熱致振動的影響規(guī)律,研究結(jié)果顯示在軌溫度環(huán)境對該結(jié)構(gòu)影響不大.對某型號航天器在軌數(shù)據(jù)進行了分析,驗證了數(shù)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.
【作者單位】： 中國空間技術(shù)研究院西安分院;
【基金】：國家自然科學(xué)基金(編號:11290154,11402196,U1537213)資助項目
【分類號】：TN820;V443.4
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本文編號：1675097