基于熱四端網絡法的建筑材料熱物性定量檢測方法研究
Quantitative diagnosis method of thermophysical properties for building materials based on thermal quadrupoles model
摘要：
基于熱四端網絡法的瞬態響應模型，建立了建筑圍護結構表面脈沖信號和階躍信號瞬態響應與圍護結構內部材料蓄熱系數之間的數學表征關系，提出了通過施加上述2種信號分析圍護結構表面瞬態響應數據來獲取材料蓄熱系數的無損檢測方法。針對隨機信號引起的瞬態響應數據，基于杜哈梅爾定理，采用反卷積法和截斷奇異值分解法，提出了重建脈沖信號響應和階躍信號響應的數值方法，突破了實際現場檢測時對圍護結構輸入信號的限制。采用上述方法對2種建筑材料進行了檢測實驗，結果表明，利用該方法可以準確快速地對建筑材料的蓄熱系數進行定量檢測。
Abstract：
The relationship between the surface transient response of pulse and step signals of the building envelope and the heat storage coefficient of the envelope materials is established based on the thermal quadrupoles model. A non-destructive diagnosis method is proposed to obtain the heat storage coefficient of the envelope materials by applying the above two kinds of signals to analyse the surface transient response data. Based on the Duhamel theorem, a numerical model of reconstructing pulse and step signal responses using the transient response data from random signals is proposed by deconvolution and TSVD (truncated singular value decomposition) methods, which breaks the limitation of input signals during the actual diagnosis. The experiments on two typical building materials are carried out to verify the method. The results show that the heat storage coefficient of building materials can be diagnosed accurately and quickly by using this method.
Keywords:buildingmaterial;buildingenvelope;thermophysicalproperty;heatstoragecoefficient;quantitativediagnosis;thermalquadrupolesmodel;buildingenergyconservation