利用热源温度场迭加法诊断持续点热源的强度及位置

可重复使用运载器的防热瓦故障会使航天器的局部结构产牛热源，并在结构中形成温度场。应用热源温度场迭加法的解函数，解得结构温度历程，然后据此温度的变化率趋势判断出热源位置，在此基础上依据多点测最值构造出辨识参数用于热强度识别，通过对一薄壁结构模型算例的计算仿真，证明了本文所提方法的有效性。论文工作为进一步开展热源诊断技术研究，提供了可资工程实践应用的数值算法体系以及有益的数值计算结论。

Deducing the Position and Intensity of Durative Point Heat Source by Heat-Source Method

The malfunction of thermal protection system on reusable launch vehicle will generate a heat source on the part of vehicle. The heat souse will lead to a temperature field. The change of structural temperature can be calculated by the heatsource method, and the heat source position can be found out. Based upon this approach, a parameter which can be used to evahuate the intensity of the heat source can be obtained hy using measured values on certain points. By analyzing a sheet structure model, the methods are testified effective. The methods and the numerical calculations of this paper can be applied to further astronautical heat-source researches.