【摘要】 月球基地建设是探月工程四期任务的核心目标，其热环境控制面临月表极端温度波动的严峻挑战．本文针对熔岩管道内基地能源供给下的温度场响应问题，提出了一种改进的非线性热传导本构模型，用于表征玄武岩的热传导特性．同时，基于有限元软件CODE＿BRIGHT建立了二维非稳态数值模型，考虑了月表周期性演化的温度边界条件与管壁加热源，系统量化了风化层厚度、埋深、截面形状及加热功率对温度场时空演化的影响机制．研究表明：(1)熔岩管道温度预测结果显著依赖于热传导本构模型的选取，与恒定热传导模型相比，温度预测值相差可达到30%;(2)风化层厚度大于1 m可完全屏蔽月表温度波动，热源的影响区范围约3倍洞径；(3)相同总加热功率条件和短轴长度的条件下，椭圆截面（长短轴比为4∶1）的洞顶温度较圆形降低了近80%．研究成果为月球基地选址、能源配置及热控系统设计提供了理论支撑和指导建议．更多还原

【Abstract】 The construction of lunar bases is a core objective of the fourth phase of the lunar exploration program. Control of the thermal environment poses significant challenges due to extreme temperature fluctuations on the lunar surface. This study focuses on analysing temperature field response within lunar lava tubes under base energy supply conditions. A nonlinear heat conduction model for basalt with temperature-dependent properties is developed, and a two-dimensional numerical model is established using finite element software CODE＿BRIGHT. The model incorporates periodic temperature boundary conditions on the lunar surface and heat sources from the tube walls. The spatiotemporal evolution of the temperature field is systematically analyzed, with a focus on the effects of regolith thickness, burial depth, cross-sectional shape, and heating power. Some conclusions are obtained:(1) The temperature-dependent nature of the conductive model significantly affects prediction accuracy, as a constant thermal conductivity model overestimates the conducted temperature by approximately 30 %;(2) Lunar rock environment parameters exhibit threshold effects: a regolith thickness greater than 1 m can fully shield surface temperature fluctuations. When the burial depth is greater than five times the diameter of the cavern, the deep-layer constant temperature characteristics will dominate the thermal evolution, with a thermal impact zone approximately three times the tube diameter;(3) An elliptical cross-section(with a long-axis ratio of 4∶1) reduces the temperature at the tube wall vertex by around 80 % compared to a circular cross-section through directional heat dissipation.These findings provide critical parameter thresholds and numerical theoretical support for lunar base site selection, energy configuration, and thermal control system design.更多还原