Department of Aerospace Engineering, The Pennsylvania State University, University Park, Philadelphia, Pennsylvania 16802, USA.
J Acoust Soc Am. 2011 Apr;129(4):EL121-7. doi: 10.1121/1.3555085.
The non-linear structural surface intensity (NSSI) based damage detection technique is extended to airframe applications. The selected test structure is an upper cabin airframe section from a UH-60 Blackhawk helicopter (Sikorsky Aircraft, Stratford, CT). Structural damage is simulated through an impact resonator device, designed to simulate the induced vibration effects typical of non-linear behaving damage. An experimental study is conducted to prove the applicability of NSSI on complex mechanical systems as well as to evaluate the minimum sensor and actuator requirements. The NSSI technique is shown to have high damage detection sensitivity, covering an extended substructure with a single sensing location.
基于非线性结构表面强度（NSSI）的损伤检测技术被扩展到机身应用中。所选的测试结构是来自 UH-60 黑鹰直升机（西科斯基飞机公司，斯特拉特福德，CT）的一个上部机舱机身部分。结构损伤是通过一个冲击谐振器装置来模拟的，该装置旨在模拟典型的非线性行为损伤所引起的振动效应。进行了一项实验研究，以证明 NSSI 在复杂机械系统中的适用性，并评估最小传感器和执行器的要求。结果表明，NSSI 技术具有很高的损伤检测灵敏度，可以用单个传感位置覆盖扩展的子结构。
