Cross-laminated timber (CLT) is gaining popularity worldwide with the development of tall wood buildings. A non-destructive testing (NDT) technique employing modal testing for the measurement of natural frequencies and a genetic algorithm for minimizing the difference between calculated and measured natural frequencies has been proposed for the inverse determination of in-plane and out-of-plane elastic constants of orthotropic Mindlin plates. Based on the exact solution of free transverse vibration of orthotropic Mindlin plates under a pair of opposite edges simply supported and the other pair free (SFSF), the effective bending and shear stiffness of two three-layer and one five-layer symmetric CLT panels were inversely determined. Moreover, the results showed that the inclusion of five sensitive vibration modes was more efficient than having more modes for the inverse determination. This study demonstrated the efficiency and potential of the non-destructive method in measuring the effective bending and shear stiffness of mass timber panels.

随着高层木建筑的发展，交叉层压木材（CLT）在世界范围内越来越受欢迎。已经提出了一种采用模态测试来测量固有频率的无损测试（NDT）技术，以及一种用于最小化计算出的固有频率和测量出的固有频率之间的差异的遗传算法，用于反求面内和面外弹性正交各向异性Mindlin板的常数。根据正交异性Mindlin板在一对相对边缘简单支撑和另一对自由（SFSF）下的自由横向振动的精确解，得出两个三层和一个五层对称CLT面板的有效弯曲和剪切刚度相反地​​确定。此外，结果表明，包含五个敏感振动模式比具有更多模式进行逆向确定更为有效。这项研究证明了无损测量方法在测量大块木板有效弯曲和剪切刚度方面的效率和潜力。