落叶松材生长特性对应力波传播速度的影响

通过对落叶松材试件进行的应力波检测试验,研究了木材节疤尺寸和数量、生长率等对应力波传播速度的影响,并对节疤尺寸等与应力波传播速度之间关系进行了回归分析.结果表明,应力波传播速度与节疤尺寸大小呈负相关,与生长率呈负相关.密度对应力波传播速度的影响在无疵试件和有节疤等试件中是不同的.

Impact of growth characteristics of Larchwood on velocity propagating of the stress wave

The testing experiment to Larchwood samplings were conducted by using stress wave testing instruments. The impacts of the dimension and quantity of knots,the growth rate and the slight grain angle on propagation velocity of the stress wave were studied,and the regressive analysis of the relationship between the wooden samples containing defects and propagation velocity of the stress wave were made.The results indicated that the propagation velocity of the stress wave had negative correlation with knot dimension and with growth rate of clear samplings.In addition,effect of the Larchwood density on the stress wave velocity differs in the wooden beams free of defects and the wooden beams containing defects etc.