To consider the influence of the quality of the accelerometer and the installation position on the test frequency, a test scheme was designed to identify the first-order bending frequency with free and cantilever beams as well as the first-order torsion frequency with free plates. According to the energy method and mode shape, the correction relationship between the elastic modulus and the first-order bending frequency of free and cantilever beams is derived alongside the relationship between the shear modulus and first-order torsion frequency of a free plate. These relationships are suitable for informing the influence of the accelerometer mass and installation. The first-order bending frequency and the first-order torsion frequency of Sitka spruce beams, slabs, and oriented strand board have been measured along the length, which verifies the effectiveness of the derived relation in testing the elastic modulus and shear modulus of wood materials. Taking the ratio m/M between the mass of the accelerometer and the mass of the test specimen as a parameter, the scope of application of the modified relation is discussed.

考虑加速度计质量和安装位置对测试频率的影响，设计了一种测试方案，确定了自由梁和悬臂梁的一阶弯曲频率以及自由板的一阶扭转频率。根据能量法和模态振型，推导出自由板和悬臂梁的弹性模量与一阶弯曲频率的修正关系，以及自由板的剪切模量与一阶扭转频率的关系。这些关系适用于告知加速度计质量和安装的影响。沿长度测量了锡特卡云杉梁、板和定向刨花板的一阶弯曲频率和一阶扭转频率，验证了推导出的关系在测试木质材料的弹性模量和剪切模量中的有效性。以加速度计质量与试样质量之比m/M为参数，讨论了修正关系的适用范围。