The aim of this study is to propose a method for measuring the mass of wood lumber in piles through a vibration test. Air-dried sitka spruce (Picea sitchensis Carr.) pieces with 1500–1600 mm length (L), 105 mm width (R), and 105 mm thickness (T) were used as specimens. We created a model of wood lumber inside a pile. A load 10 times that of the specimen was applied to the specimen, and vibration was initiated in the direction of the specimen’s length. The vibration test was conducted for the specimen with, and without a small steel plate. The specimen mass was estimated without weighing using the method based on the difference of the resonance frequency when a concentrated mass is added to and subtracted from wood. The specimen mass was thus estimated accurately through this vibration method. It is possible that the mass of the water removed from the wood lumber by drying can be estimated with this vibration method.

中文翻译：

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通过振动测试估算的堆积木质量

这项研究的目的是提出一种通过振动测试测量桩中木材的质量的方法。使用风干的西特卡云杉（Picea sitchensis Carr。）片（长（L）为1500-1600 mm，宽（R）为105 mm，厚（T）为105 mm。我们在堆中创建了一个木材模型。将10倍于样品的载荷施加到样品上，并沿样品长度方向开始振动。对有和没有小钢板的样品进行振动测试。当在木材中添加和减去浓缩后的质量时，根据共振频率的差异，使用该方法无需进行称重即可估计样品质量。因此，通过这种振动方法可以准确地估算出样品质量。