【作者】 徐慧；

【导师】 白乙拉；

【作者基本信息】 渤海大学 ， 应用数学， 2012， 硕士

【摘要】 本文以淡水冰的热传导过程为背景，根据黑龙江红旗泡水库淡水冰的现场观测数据，利用分布参数系统的参数辨识方法，辨识得到了淡水冰的导温系数依赖于冰温的变化关系式，并使用该关系式模拟山西太原汾河二库淡水冰温度场的变化情况。本文所研究的内容是国家自然科学基金项目（No:40806075）的一部分。本文的主要研究结果概括如下：1.本文利用在黑龙江红旗泡水库现场观测获得的气温、水库淡水冰表面总辐射、冰内的温度、冰的厚度、水库冰盖下水温等系列数据。依据分布参数系统的参数辨识方法，把实测数据每两天为一组，分为87组，将每组数据用线性函数和指数函数分别拟合导温系数，以寻求导温系数同温度的微小变化关系，最后归纳出整个温度区间上的导温系数函数。2.在模拟2004年山西太原汾河二库淡水冰的温度场变化情况时，模型中的淡水冰导温系数分别使用经验性的常数和辨识得到的与冰温有关的导温系数关系式。然后，将两种导温系数模拟的冰温进行对比。结果表明：使用辨识得到的导温系数关系式模拟的冰温与实测冰温间的误差更小。从而说明辨识得到的导温系数关系式更符合实际情况。更多还原

【Abstract】 With fresh ice heat-conduction as the background, based on the siteobservation data of fresh ice temperature in Hong Qipao Reservoir, we used theparameter identification of distributed parameter system, and get the relationalexpression that was between fresh ice thermal diffusivity and ice temperature. Weapplied this relational expression to simulate the situation of ice temperature inShanxi. The study in this paper is supported by the national natural sciencefoundation of China (40806075). The major academic achievements of this paperas follows:We use the data of the temperature, total radiation in reservoir of ice surface,ice temperature, ice thickness and water temperature et cetera that we observed inHong Qipao Reservoir. Based on the parameter identification method of parametersystem,87groups of data can be got by two days a group. Used linear and indexfunction fitted thermal diffusivity, for finding relationship between thermaldiffusivity and ice temperature. Finally we summarized thermal diffusivityrelationship during temperature region.2. We applied the relational expression that is empirical constant and thermaldiffusivity about ice temperature, when we simulate fresh ice temperature inShanxi in2004. Then compare to these two results. The results show that the icetemperature, which was simulating the given relational expression of thermaldiffusivity, is close to observing ice temperature.更多还原