树木内部应力波传播速度模型研究

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1、ABSTRACT3.Thecamphortree,acaciatreeandChinaberrydiscwithdefectsuchasdecayandcrackweredetected,andtheexperimentresultshowedthatduetotheexistenceofhollowness,decayandcrack,thefittedcurvebetweenthedirectionangleandstresswavetransmissionvelocitydidnotpresenttherelationofqu

2、adraticfunction.Inthedefectiveposition,thecurvewouldsinkinwardlywithasignificantdifferencefromtheexperimentonhealthytrees.Therefore,thestresswavetransmissionvelocitymodelproposedinthispaperhadagoodguidingsignificancetothedetectionofinternaldefectoftrees.Keywords：Trees；

3、StressWave；VelocityModel；Non-destructiveTestingIII万方数据目录目录摘要......................................................................................................................................................IABSTRACT..................................................

4、.....................................................................................II1绪论..................................................................................................................................................11.1研究背景.........................

5、......................................................................................................11.2研究的目的和意义...............................................................................................................21.2.1研究目的..................................

6、..................................................................................21.2.2研究意义....................................................................................................................31.3基于应力波的木材无损检测技术的国内外研究现状...................................

7、...................31.3.1国外研究现状............................................................................................................31.3.2国内研究现状............................................................................................................51.4木材应力波无

8、损检测设备研究现状...................................................................................61.4.1仪器发展现状.............