摘要
本文首先借助模态试验验证了文中提出的试验装置对试件实现了自由支承,然后用瞬态激励测试了试件的一阶固有频率,并推算出SPF规格材的弹性模量。根据GB50005-2003《木结构设计规范》,评价了这批SPF规格材的弹性模量达Ⅱc级要求的概率为96.3%。瞬态激励频率法具有快速、简便、重复性好、精度高的优点。该方法对轻型木结构行业的检测工作具有一定的应用价值。
With the help of modal experiment, the free support of specimen mounted on experimental apparatus proposed in this paper was verified firstly. Then, the first order natural frequency of specimen was measured by transient excitation and the modulus of elasticity of dimensioned SPF lumber was calculated. According to GB50005-2003 ＂Code for design of timber structures＂, the probability of modulus of elasticity of this batch of SPF dimensioned lumbers reaching Ⅱ c level is 96.3%. The transient excitation frequency method is rapid, simple and reproducible and has high accuracy. So, it is applicable for testing in industry of light wood frame construction.
出处
《实验力学》
CSCD
北大核心
2013年第5期642-648,共7页
Journal of Experimental Mechanics
基金
2012年江苏省苏北科技发展计划科技型企业技术创新资金项目(BC2012416)资助
2012-2013年江苏高校优势学科建设工程项目资助(PAPD
164020639)
