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Localization of Hypervelocity Impact- Engendered Damage In Stiffened Curved Structures Using In-Situ Acoustic Emission

机译:使用原位声发射的加强弯曲结构中的超细尺寸的定位冲击 - 在加强弯曲的结构中

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Pervasive in Earth' orbit, hypervelocity impact (HVI), caused by micrometeoroids and orbital debris (MMOD), poses an immense threat to the safety and integrity of spacecraft, leading to the failure and fragmentation of the entire spacecraft structures. Addressing such an issue, HVI-induced damage in space structures is localized using in-situ acoustic emission (AE). However, conventional AE localization techniques in the stiffened curved structures require either the knowledge of the direction dependent velocity profile or a dense array of sensors, due to the attenuation and anisotropic-like propagation of AE signals. In this work, a new approach of area localization is proposed to locate the HVI-induced acoustic source in large-scale anisotropic-like plates with a sparse array of sensors, and without knowing the direction dependent velocity profile in the plate. On this basis, the impact spot can be precisely located.
机译:由MicroMeteoroids和Orbital碎片(MMOD)引起的地球轨道轨道,超细型撞击(HVI),对航天器的安全性和完整性构成了巨大的威胁,导致整个航天器结构的故障和碎片。解决此类问题,HVI引起的空间结构损坏是使用原位声发射(AE)的定位。然而,由于AE信号的衰减和各向异性的传播,加强弯曲结构中的传统AE定位技术需要所知方向速度曲线或致密的传感器阵列。在这项工作中,提出了一种新的区域定位方法,以在具有稀疏传感器阵列的大规模各向异性板中定位HVI诱导的声源,并且不知道板中的方向相关的速度曲线。在此基础上,撞击点可以精确定位。

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