对桉木胶合板液氮处理前后的动态弹性模量测量与分析

本文运用结构动力学理论,采用瞬态激励法分别测算了七层桉木(Eucalyptus)胶合板超低温(-196℃)处理前后的动弹性模量值2,并对测量结果进行了对比分析。结果表明:超低温(-196℃)处理后,桉木胶合板的动弹性模量值下降幅度5%左右,且其动弹性模量变异性减小。本研究以期为制作良好动态力学性能的绝缘箱产品提供新材料,具有较好的应用价值。

Eucalyptus plywood for handling dynamic elastic modulus properties of liquid nitrogen

In this paper, the theory of structural dynamics, transient excitation method were estimated using a seven Eucalyptus Plywood ultra-low temperature （-196 ℃） dynamic elastic modulus before and after 2, and measurement results were compared and analyzed. The results showed that： ultra-low temperature （-196 ℃） treatment, eucalyptus plywood dynamic elastic modulus decrease of about 5%, and the dynamic elastic modulus increased heterosexual reduced. In this study, for the production of a good dynamic mechanical properties of the insulation box products provide new materials with better value.