SPF规格材弹性模量的频率法测试及其评价  

Modulus of Elasticity Testing of Dimensioned SPF Lumber and its Evaluation Based on Frequency Method

作　　者：王正[1] 王智恒[1] 饶鑫[2] 刘斌[1] 杨燕[1] 

机构地区：[1]南京林业大学木材工业学院,江苏南京210037 [2]江苏农林职业技术学院,江苏镇江212400

出　　处：《实验力学》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)

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.

关 键 词：云杉-松木-冷杉(SPF) 弹性模量 频率 模态 评价 

分 类 号：TS643[轻工技术与工程]