【摘要】 该文对木材对数衰减量测定中常用的三种激振方法——冲击激振、正弦激振和声波激振进行了实验分析比较.结果表明,根据木材的特点合理地选择激振方法,可以减小或者消除由于激振方法不当而引起的误差.更多还原

【Abstract】 There have been comparisons among three exciting ways,which are impact, sine wave and sound wave excitation used in measuring logarithmic decrement of wood,in this paper.The result of the test showed that if a suitable way of excitation according to the characteristic of wood was used,it is possible to reduce or eliminate the error of logarithmic decrement caused by the different way of excitation.更多还原