论文部分内容阅读
用实际测试数据对变热流模型进行验证,并应用变热流模型进行数值模拟,研究加热功率波动方向、波动发生时刻、波动幅度、波动持续时间等因素对采用恒热流模型辨识岩土热物性参数的影响。结果表明:1)在采用恒热流模型辨识岩土导热系数时,短时间的加热功率上下波动对岩土热物性参数辨识结果影响较小;2)持续较长时间的单方向加热热流波动对结果影响较大,且与波动发生的时刻密切相关——发生在初始时刻时,岩土导热系数的偏差值最大,测试后期波动造成的偏差值也较大,波动出现在中间时段对辨识结果影响较小。
The heat flow model is verified by the actual test data, and the numerical simulation of the heat flow model is applied. The influences of the heating power fluctuation direction, the fluctuation time, the fluctuation range and the duration of the fluctuation are studied. influences. The results show that: 1) when the thermal conductivity of rock and soil is identified by constant heat flux model, the fluctuation of short-term heating power has little effect on the identification of geothermal parameters; 2) the unidirectional heating flux fluctuating for a long time Which is greatly affected and closely related to the moment when the fluctuation occurs - the deviation of the thermal conductivity of geomaterials at the initial time is the largest, and the deviation caused by the fluctuation of the test is also large. The fluctuation in the middle time period has a greater influence on the identification result small.