Improving the transportation temperature is one of the key parameters to ensure the safe and economic operation of heating transportation pipelines,and pipelines can hardly reach the theoreti-cally steady state in the engineering practice. For buried hot oil pipelines, a temperature dynamic re-sponse model from downstream to upstream is developed. With four theoretical upstream temperature boundaries and the influence of the dynamic heat storage of soil, the response features of the down-stream temperature are studied. The results show that the similarity between the downstream and up-stream temperature is higher when the upstream temperature gradually changes, and the similarity is lower when the upstream temperature suddenly changes; when the upstream temperature changes ran-domly according to the normal distribution,the downstream temperature also follows the normal distri-bution,and its average value and standard deviation also decrease at the same time.%加热输送管道的温度是控制其安全、经济运行的关键参数之一,工程实践中管道很难达到理论意义上的稳定输送状态.针对埋地热油管道,建立了管道下游对上游的温度动态响应模型.选取四种理论上具有代表性的上游温度边界,考虑土壤动态蓄热的影响,研究下游温度的响应特征.结果表明,当上游温度渐变时,下游温度与上游温度的相似度较好;当上游温度突变时,下游温度与上游温度的相似度较差;当上游温度按正态分布随机变化时,下游温度也满足正态分布,其均值与标准差同时减小.
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