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

【摘要】：對(duì)一類(lèi)裝備大型環(huán)形桁架天線(xiàn)的航天器在軌環(huán)境下的熱-結(jié)構(gòu)耦合問(wèn)題進(jìn)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(xiàn)性疊加,引入了熱-彈耦合的線(xiàn)性時(shí)變剛度,建立了環(huán)形桁架天線(xiàn)的索網(wǎng)-框架組合結(jié)構(gòu)熱-彈耦合動(dòng)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(duì)各部件溫度變化的影響,建立了時(shí)變溫度場(chǎng)模型.將得到的溫度場(chǎng)作為外載荷激勵(lì),分析了進(jìn)出地影期溫度變化對(duì)航天器結(jié)構(gòu)熱致振動(dòng)的影響規(guī)律,研究結(jié)果顯示在軌溫度環(huán)境對(duì)該結(jié)構(gòu)影響不大.對(duì)某型號(hào)航天器在軌數(shù)據(jù)進(jìn)行了分析,驗(yàn)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(guó)空間技術(shù)研究院西安分院;
【基金】：國(guó)家自然科學(xué)基金(編號(hào):11290154,11402196,U1537213)資助項(xiàng)目
【分類(lèi)號(hào)】：TN820;V443.4
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本文編號(hào)：1675097