木材导温系数的理论表达式

木材是各向异性的天然高分子有机体 ,其化学组成与结构的复杂性导致迄今未见有木材导温系数的理论研究成果报道 .综合运用木材物理学、统计热力学、物理力学等多种学科 ,从木材的化学组成和微观结构出发 ,从理论上推导出木材导温系数的理论表达式 ,应用该表达式计算 2 0种左右木材弦向和径向导温系数 ,并与实验值对照 ,理论值的平均误差在 7%左右

The Theoretical Expressions of Wood Thermal Diffusivity

The chemical element and structure of wood are so complicated that,due to the diffuculty in the theoretical studying of the thermal diffusivity,there hasn't any theoretical study of the wood thermal diffusivity so far In this paper,the \{theoretical\} expressions of thermal diffusivity in the choral and radial direction are derived by thermodynamics and physical mechanics from chemical element and microstructure of wood. The theoretical expressions are used to calculate the thermal diffusivity in the choral and radial direction of about 20 species of trees,by comparing with the experimental values ,the average error of the theoretical values is about 7%.