南京林业大学学报（自然科学版）
南京林業大學學報（自然科學版）
남경임업대학학보（자연과학판）
Journal of Nanjing Forestry University (Natural Science Edition)
2015年
6期
131-136
,共6页
管成%张厚江%周卢婧%林蔚
管成%張厚江%週盧婧%林蔚
관성%장후강%주로청%림위
足尺人造板%“自由-自由”支承自由振动%动态黏弹性%储能模量%损耗模量
足呎人造闆%“自由-自由”支承自由振動%動態黏彈性%儲能模量%損耗模量
족척인조판%“자유-자유”지승자유진동%동태점탄성%저능모량%손모모량
full-size wood composite panel%“free-free” supporting free vibration%dynamic viscoelasticity%storage modu-lus%loss modulus
为了快速检测足尺人造板整板的动态黏弹性，提出了一种基于“自由－自由”支承自由振动原理的检测方法，即通过测量在两节线处线支承下足尺人造板自由振动时的第一阶固有频率、衰减振动波形的对数减幅系数和人造板的质量来检测足尺人造板整板的动态黏弹性。利用自行研制的足尺人造板力学性能检测试验装置，检测了120张足尺刨花板和胶合板的动态黏弹性，并将检测结果与基于悬臂振动原理的小试件动态黏弹性检测法测量结果进行了对比。结果表明：两者间有显著的线性相关关系，储能模量和损耗模量的相关系数分别达到0?944和0?956。因此，基于“自由－自由”支承自由振动法来检测足尺人造板的动态黏弹性是可行的。
為瞭快速檢測足呎人造闆整闆的動態黏彈性，提齣瞭一種基于“自由－自由”支承自由振動原理的檢測方法，即通過測量在兩節線處線支承下足呎人造闆自由振動時的第一階固有頻率、衰減振動波形的對數減幅繫數和人造闆的質量來檢測足呎人造闆整闆的動態黏彈性。利用自行研製的足呎人造闆力學性能檢測試驗裝置，檢測瞭120張足呎鑤花闆和膠閤闆的動態黏彈性，併將檢測結果與基于懸臂振動原理的小試件動態黏彈性檢測法測量結果進行瞭對比。結果錶明：兩者間有顯著的線性相關關繫，儲能模量和損耗模量的相關繫數分彆達到0?944和0?956。因此，基于“自由－自由”支承自由振動法來檢測足呎人造闆的動態黏彈性是可行的。
위료쾌속검측족척인조판정판적동태점탄성，제출료일충기우“자유－자유”지승자유진동원리적검측방법，즉통과측량재량절선처선지승하족척인조판자유진동시적제일계고유빈솔、쇠감진동파형적대수감폭계수화인조판적질량래검측족척인조판정판적동태점탄성。이용자행연제적족척인조판역학성능검측시험장치，검측료120장족척포화판화효합판적동태점탄성，병장검측결과여기우현비진동원리적소시건동태점탄성검측법측량결과진행료대비。결과표명：량자간유현저적선성상관관계，저능모량화손모모량적상관계수분별체도0?944화0?956。인차，기우“자유－자유”지승자유진동법래검측족척인조판적동태점탄성시가행적。
The dynamic viscoelasticity of full?size composite panels is an important inductor to characterize mechanical properties. At present, domestic and international detection methods and equipment are not capable of mearsuring full?size wood composite panels? dynamic viscoelasticity. In order to detect the dynamic viscoelasticity of full?size wood com?posite panels quickly, this paper presents a test method based on “free?free” supporting free vibration principle. The first order natural frequency of full?size wood composite panels supported in “free?free” condition, log of the coefficient of attenuation of vibration wave and the quality of wood composite panels were measured to detect the dynamic viscoelas?ticity of full?size composite panels. The dynamic viscoelasticity of 120 pieces of particleboard and plywood panels were tested using a laboratory testing apparatus for measuring mechanical performance of full?size wood composite panels. Fol?lowing free vibration testing, one small specimens were cut from each panel and cantilever vibration test was then per?formed on each specimen to obtain dynamic viscoelasticity. Then, comparing the test results of two kinds of methods, the results indicate that there is a very significant linear correlation between them, and the correlation coefficient of storage modulus and loss modulus of correlation coefficient is 0. 944 and 0. 956, respectively. It also proves that the detection method of the dynamic viscoelasticity of full?size wood composite panels based on “free?free” supporting free vibration principle vibration is feasible.
