时域弯曲脉冲响应函数的应用
Applications of the Flexural Impulse Response Functions in the Time Domain
摘要：
本文研究了在坐标系原点处受力激励的无限长梁和板的响应函数及其在时间反演和时频分析中的应用。Euler-Bernoulli梁的响应函数的推导和板重新访问。给出了关于能量守恒和流动性的解释。一个可能的替代方法来测量SEA耦合损耗因子的草图。在实验中测量了有限长梁的冲激响应，并与理论计算结果进行了比较。在脉冲第一次反射前的实验数据与理论符合得很好。响应函数用于模拟时间反转脉冲。通过实验验证了数值模拟的正确性。
英文摘要：
This work addresses the response functions for infinite beams and plates with a force excitation at the origin of the coordinate system and its application to time reversal and time frequency analysis. The response function for Euler-Bernoulli beams is derived and for plates revisited. Interpretation concerning energy conservation and mobility are given. An possible alternative method to measure the coupling loss factors in SEA is sketched. \\ The impulse response of a finite beam is measured in an experiment and compared with that predicted theoretically. The experimental data before the first reflection of the pulse showed good agreement with the theory. The response function is used to simulate a time reversed pulse. This numerical simulation is verified with an experiment.
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