【摘要】：采用參數(shù)敏感性分析法研究了微膨脹型熱開關(guān)導(dǎo)熱路徑上各項(xiàng)不確定因素對其斷開熱阻、閉合熱阻及開關(guān)比等關(guān)鍵熱特性的影響。通過與性能試驗(yàn)的比對,驗(yàn)證了熱開關(guān)有限元仿真熱模型的正確性�；谠撃Ｐ�,分析了結(jié)構(gòu)組件導(dǎo)熱系數(shù)和配合面接觸熱導(dǎo)率與斷開熱阻、閉合熱阻等熱特性的關(guān)聯(lián)性,并依據(jù)性能指標(biāo)的絕對/相對變化量對不確定因素進(jìn)行了敏感性分類。研究表明:定位桿導(dǎo)熱系數(shù)是關(guān)于斷開熱阻和開關(guān)比的敏感參數(shù),敏感性指標(biāo)分別為6.716m~(0.5)·K/W和5.129 m~(0.5)·K~(0.5)/W~(0.5);冷端-伸縮段間接觸熱導(dǎo)率是閉合熱阻的敏感參數(shù),絕對變化量和敏感性指標(biāo)分別為1.865K/W和0.267m·K/W,其余配合面的接觸熱導(dǎo)率均是閉合熱阻的不敏感參數(shù);定位桿徑向小面接觸熱導(dǎo)率是斷開熱阻和開關(guān)比的敏感參數(shù),絕對變化量(敏感性指標(biāo))分別為56.495K/W(0.307m·K/W)和32.936(0.235m·K~(0.5)/W~(0.5))。所得的結(jié)論可為優(yōu)化微膨脹型熱開關(guān)的結(jié)構(gòu)性能提供參考與借鑒。
[Abstract]:By means of parameter sensitivity analysis, the influence of various uncertain factors on the key thermal characteristics such as breaking resistance, closing thermal resistance and switching ratio on the thermal conductivity path of micro-expansion type thermal switch is studied. Through the comparison with the performance test, the correctness of the thermal switching finite element simulation thermal model is verified. Based on the model, the relationship between thermal conductivity of structural assembly and contact thermal conductivity of structural assembly, breaking thermal resistance and closed thermal resistance is analyzed, and the sensitivity of uncertain factors is classified according to the absolute / relative variation of performance index. The results show that the thermal conductivity coefficient of the positioning rod is a sensitive parameter about the breaking resistance and the switch ratio, and the sensitivity indexes are 6.716m0.5K / W0.5 and 5.129 m0.5K0.5 / W0.5, respectively. The contact thermal conductivity between cold end and stretch section is a sensitive parameter of closed thermal resistance. The absolute change and sensitivity index are 1.865K/W and 0.267 m 路K / W, respectively. The contact thermal conductivity of other contact surfaces is insensitive to closed thermal resistance. The radial contact thermal conductivity of the positioning rod is a sensitive parameter for breaking the thermal resistance and switching ratio. The absolute variation (sensitivity index) was 56.495K/W (0.307 m 路K / W) and 32.936 (0.235 m 路K ~ (0.5) / W ~ (0.5).) respectively). The conclusion can be used for reference to optimize the structure and performance of micro-expansion heat switch.
【作者單位】： 中國科學(xué)院長春光學(xué)精密機(jī)械與物理研究所;中國科學(xué)院大學(xué);
【基金】：中國科學(xué)院長春光學(xué)精密機(jī)械與物理研究所空間機(jī)器人中心創(chuàng)新基金資助項(xiàng)目(No.SREC2013CX0201)
【分類號】：V444.36

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