本文選題：超導復合材料　切入點：低溫　出處：《低溫物理學報》2017年04期 　論文類型：期刊論文

【摘要】：本文針對超導材料在低溫和跨溫區(qū)環(huán)境下的熱傳導特性,基于廣義熱傳導理論并考慮超導材料低溫下的比熱、熱導率的溫度依賴性,建立了一描述超導復合帶材在點熱源觸發(fā)下的非線性熱傳導模型.采用有限元法進一步求解獲得了超導復合帶材低溫和跨溫區(qū)環(huán)境下的溫度場演化特征.研究結果表明:低溫下超導復合材料的參數(shù)溫度依賴性對其溫度分布與熱傳導特性有著顯著影響,其隨初始環(huán)境溫度的升高而逐漸減弱;熱松弛時間對低溫下超導材料的熱傳導具有顯著影響.另外,文中還討論了超導復合材料不同銅超比對其低溫熱傳導的影響等.
[Abstract]:In this paper, based on the generalized theory of heat conduction and considering the temperature dependence of specific heat and thermal conductivity of superconducting materials at low temperature and transthermal region, the thermal conductivity of superconducting materials is studied. A nonlinear heat conduction model for superconducting composite tapes under the trigger of point heat source is established. The evolution characteristics of temperature field in low temperature and cross temperature regions of superconducting composite tapes are obtained by using finite element method. The results show that the temperature dependence of the superconducting composites at low temperature has a significant effect on the temperature distribution and thermal conductivity. The thermal relaxation time has a significant effect on the thermal conductivity of superconducting materials at low temperature. In addition, the effects of different copper superconductivity ratios on the low temperature thermal conductivity of superconducting composites are also discussed.
【作者單位】： 蘭州大學西部災害與環(huán)境力學教育部重點實驗室土木工程與力學學院;
【基金】：國家自然科學基金(11672120,11421062) 國家ITER專項磁約束聚變工程關鍵問題(2013GB110002B) 中央高校基本科研業(yè)務費專項資金(lzujbky-2017-it62)資助的課題
【分類號】：TM26
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本文編號：1643500