用自由振动法研究木材的动弹性模量

弹性模量是木材的重要力学性质。到目前为止,仅通过拉伸、压缩或弯曲试验测得了木材的静弹性模量。研究表明,木材在静载和动载下的弹性模量有所不同。作者通过试验摸索并参照有关文献,用自由振动法研究了椴木的动弹性模量。这为在动态情况下合理地使用椴木开辟了一个新的途径。试验表明,自由振动法是研究木材动弹性模量的一种简捷、快速、准确的测定方法。用该方法还可进一步研究不同种类木材的动弹性模量以及周围环境,例如温度、湿度等对木材动弹性模量的影响。

STUDY ON DYNAMIC ELASTIC MODULUS WITH FREE VIBRATION

Elastic modulus is an important mechanical characteristic of wood. So far, we have found that the static elastic modulus of wood can only be measured through the experiments of tension, compression and bending. Other studies show that the wood static elastic modulus and the dynamic elastic modulus are different. Through experiments and references, the author has studied the dynamic elastic modulus of linden wood with the free vibration method in this paper , which has opened a new path of utilizing the linden wood in a reasonable way. The experiment shows that free vibration is a simple, fast and accurate method in the study of dynamic elastic modulus of wood. We can also study the dynamic elastic modulus of other kinds of wood and the effects of environment factors such as temperature and moisture on the dynamic elastic modulus of wood with this method.