Impulse Excitation Apparatus for Anisotropic Material Characterization

研制了一种利用脉冲激励检测具有各向异性特性的固体无约束自由振动共振模态的实验装置。这种模式很难用更传统的声学光谱技术来检测，特别是对于固体的特定几何形状。将测量与数值计算相结合，提出了一种确定未知材料性质的有效方法。该仪器还用于运输结构的无损评估和动力学和振动原理的课堂演示。＊＊＊

9732761 Heyliger An experimental device is acquired to detect resonant modes of unrestrained free vibration of solid objects with anisotropic properties using impulse excitation.Such modes are difficult to detect using more traditional acoustic spectroscopy techniques, particulary for specific geometries of the solid. Combining the measurements with numerical calculations and an inverse scheme, a powerful method is developed to determine material properties of materials with unknown constitution. The apparatus is also used for nondestructive evaluation of transportation structures and classroom demonstration of principles in dynamics and vibration. ***