Identification of impact force acting on composite laminated plates using the radiated sound measured with microphones
Identification of impact force acting on composite laminated plates using the radiated sound measured with microphones
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DOI：
10.1016/j.jsv.2017.06.009
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发表时间：
2017-09
影响因子：
4.7
通讯作者：
S. Atobe;Shunsuke Nonami;N. Hu;H. Fukunaga
中科院分区：
文献类型：
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作者：
S. Atobe;Shunsuke Nonami;N. Hu;H. Fukunaga
外物冲击事件是对复合材料层合板的严重威胁，因为冲击损伤导致结构的力学性能显著下降。识别施加到结构上的冲击的位置和力历史可以为评估结构完整性提供有用的信息。本文提出了一种基于受冲击结构辐射声识别CFRP层合板冲击力的方法。使用麦克风测量的声压来识别撞击位置和力历史。为了设计一种用于根据用麦克风检测到的声波的到达时间的差异来识别撞击位置的方法，检查声波从撞击点到传感器的传播路径。对于力的历史的识别，实验构造的传递矩阵被用来将力的历史与相应的声压相关联。为了验证所提出的方法的有效性，进行了冲击试验，采用CFRP正交铺设层合板作为试样，脉冲锤作为冲击器。实验结果证实了本方法的有效性，用于识别的碰撞位置从与麦克风检测到的声波的到达时间。此外，力历史识别的结果表明，使用实验传递矩阵的测量声压准确识别力历史的可行性。
Foreign object impact events are serious threats to composite laminates because impact damage leads to significant degradation of the mechanical properties of the structure. Identification of the location and force history of the impact that was applied to the structure can provide useful information for assessing the structural integrity. This study proposes a method for identifying impact forces acting on CFRP (carbon fiber reinforced plastic) laminated plates on the basis of the sound radiated from the impacted structure. Identification of the impact location and force history is performed using the sound pressure measured with microphones. To devise a method for identifying the impact location from the difference in the arrival times of the sound wave detected with the microphones, the propagation path of the sound wave from the impacted point to the sensor is examined. For the identification of the force history, an experimentally constructed transfer matrix is employed to relate the force history to the corresponding sound pressure. To verify the validity of the proposed method, impact tests are conducted by using a CFRP cross-ply laminate as the specimen, and an impulse hammer as the impactor. The experimental results confirm the validity of the present method for identifying the impact location from the arrival time of the sound wave detected with the microphones. Moreover, the results of force history identification show the feasibility of identifying the force history accurately from the measured sound pressure using the experimental transfer matrix.